forward search in math insets. ugly. seems to work. don't ask why.

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@3279 a592a061-630c-0410-9148-cb99ea01b6c8

src/mathed/formulabase.C

@@ -40,8 +40,10 @@
 #include "math_cursor.h"
 #include "math_factory.h"
 #include "math_hullinset.h"
+#include "math_iterator.h"
 #include "math_macrotable.h"
 #include "math_parser.h"
+#include "math_pos.h"
 #include "math_spaceinset.h"
 #include "undo_funcs.h"
 
@@ -113,6 +115,7 @@ void InsetFormulaBase::metrics(BufferView * bv, LyXFont const & f) const
 	metrics(bv);
 }
 
+
 void InsetFormulaBase::metrics(BufferView * bv) const 
 {
 	if (bv)
@@ -220,7 +223,7 @@ void InsetFormulaBase::showInsetCursor(BufferView * bv, bool)
 		MathMetricsInfo mi(bv, font_, display() ? LM_ST_DISPLAY : LM_ST_TEXT);
 		math_font_max_dim(LM_TC_TEXTRM, mi, asc, des);
 		bv->fitLockedInsetCursor(x, y, asc, des);
-		//lyxerr << "showInsetCursor: x: " << x << " y: " << y << "\n";
+		//lyxerr << "showInsetCursor: x: " << x << " y: " << y << " yo: " << yo_ << "\n";
 	}
 	toggleInsetCursor(bv);
 }
@@ -717,6 +720,64 @@ int InsetFormulaBase::xhigh() const
 /////////////////////////////////////////////////////////////////////
 
 
+bool InsetFormulaBase::searchForward(BufferView * bv, string const & str,
+                   bool const &, bool const &)
+{
+#ifdef WITH_WARNINGS
+#warning pretty ugly
+#endif
+	static InsetFormulaBase * lastformula = 0;
+	static MathIterator current = MathIterator(ibegin(par().nucleus()));
+	static MathArray ar;
+	static string laststr;
+
+	if (lastformula != this || laststr != str) {
+		//lyxerr << "reset lastformula to " << this << "\n";
+		lastformula = this;
+		laststr = str;
+ 		current	= ibegin(par().nucleus());
+		ar.clear();
+		mathed_parse_cell(ar, str);
+	} else {
+		++current;
+	}
+	//lyxerr << "searching '" << str << "' in " << this << ar << endl;
+
+	for (MathIterator it = current; it != iend(par().nucleus()); ++it) {
+		if (it.cell().matchpart(ar, it.position().pos_)) {
+			mathcursor->setSelection(it.cursor(), ar.size());
+			current = it;
+			it.jump(ar.size());
+			// I guess some of the following can go
+			bv->toggleSelection(true);
+			hideInsetCursor(bv);
+			updateLocal(bv, true);
+			showInsetCursor(bv);
+			metrics(bv);
+			return true;
+		}
+	}
+
+	//lyxerr << "not found!\n";
+	lastformula = 0;
+	// we have to unlock ourself in this function by default!
+	// don't ask me why...
+	bv->unlockInset(this);
+	return false;
+}
+
+
+bool InsetFormulaBase::searchBackward(BufferView * bv, string const & what,
+                    bool const & a, bool const & b)
+{
+	lyxerr << "searching backward not implemented in mathed" << endl;
+	return searchForward(bv, what, a, b);
+}
+
+
+/////////////////////////////////////////////////////////////////////
+
+
 void mathDispatchCreation(BufferView * bv, string const & arg, bool display)
 {
 	if (bv->available()) {

src/mathed/formulabase.h

@@ -102,6 +102,16 @@ public:
 	///
 	BufferView * view() const { return view_; }
 
+	///
+	virtual bool searchForward(BufferView *, string const &,
+	                           bool const & = true, bool const & = false);
+	///
+	virtual bool searchBackward(BufferView *, string const &,
+	                            bool const & = true, bool const & = false);
+	///
+	virtual bool isTextInset() const { return true; }
+
+
 private:
 	/// unimplemented
 	void operator=(const InsetFormulaBase &);

src/mathed/math_cursor.C

@@ -1449,3 +1449,10 @@ void MathCursor::stripFromLastEqualSign()
 }
 
 
+void MathCursor::setSelection(cursor_type const & where, size_type n)
+{
+	selection_ = true;
+	Anchor_ = where;
+	Cursor_ = where;
+	cursor().pos_ += n;
+}

src/mathed/math_cursor.h

@@ -235,6 +235,8 @@ public:
 	void dump(char const * str) const;
 	///
 	void stripFromLastEqualSign();
+	/// moves on 
+	void setSelection(cursor_type const & where, size_type n);
 
 	///
 	friend class Selection;

src/mathed/math_data.C

@@ -211,10 +211,17 @@ MathArray::iterator MathArray::end()
 
 bool MathArray::match(MathArray const & ar) const
 {
-	if (size() != ar.size())
+	return size() == ar.size() && matchpart(ar, 0);
+}
+
+
+bool MathArray::matchpart(MathArray const & ar, pos_type pos) const
+{
+	if (size() < ar.size() + pos)
 		return false;
-	for (const_iterator it = begin(), jt = ar.begin(); it != end(); ++it, ++jt)
+	const_iterator it = begin() + pos; 
-		if (!it->nucleus()->match(jt->nucleus()))
+	for (const_iterator jt = ar.begin(); jt != ar.end(); ++jt, ++it)
+		if (!jt->nucleus()->match(it->nucleus()))
 			return false;
 	return true;
 }

src/mathed/math_data.h

@@ -108,8 +108,12 @@ public:
 	void dump2() const;
 	///
 	void substitute(MathMacro const &);
-	///
+	/// looks for exact match
 	bool match(MathArray const &) const;
+	/// looks for inclusion match starting at pos
+	bool matchpart(MathArray const &, pos_type pos) const;
+	/// looks for containment
+	const_iterator find(MathArray const &) const;
 	///
 	void replace(ReplaceData &);
 

src/mathed/math_iterator.C

@@ -59,6 +59,12 @@ MathXArray const & MathIterator::xcell() const
 }
 
 
+MathArray const & MathIterator::cell() const
+{
+	return par()->xcell(position().idx_).data_;
+}
+
+
 MathInset * MathIterator::nextInset() const
 {
 	if (position().pos_ == xcell().data_.size())
@@ -132,6 +138,13 @@ void MathIterator::operator++()
 }
 
 
+void MathIterator::jump(int i)
+{
+	position().pos_ += i;
+	lyx::Assert(position().pos_ >= 0);
+	lyx::Assert(position().pos_ <= cell().size());
+}
+
 
 bool operator==(MathIterator const & it, MathIterator const & jt)
 {
@@ -151,7 +164,6 @@ bool operator!=(MathIterator const & it, MathIterator const & jt)
 }
 
 
-
 MathIterator ibegin(MathInset * p)
 {
 	return MathIterator(p);

src/mathed/math_iterator.h

@@ -18,8 +18,10 @@ public:
 	MathCursorPos const & operator*() const;
 	///
 	MathCursorPos const & operator->() const;
-	///
+	/// move on one step
 	void operator++();
+	/// move on several steps
+	void jump(int n);
 	/// read access to top most item
 	MathCursorPos const & position() const;
 	/// write access to top most item
@@ -32,9 +34,11 @@ public:
 	MathInset * par();
 	/// helper for iend
 	void goEnd();
-	
+	/// read access to top most item
-private:
+	MathArray const & cell() const;
-	/// write access to top most item
+
+private:	
+	/// read access to top most item
 	MathXArray const & xcell() const;
 	/// write access to top most item
 	MathInset * nextInset() const;

src/mathed/math_pos.C

@@ -20,6 +20,7 @@ MathCursorPos::MathCursorPos(MathInset * p)
 }
 
 
+
 MathArray & MathCursorPos::cell(MathArray::idx_type idx) const
 {
 	lyx::Assert(par_);