THis partially fixes wrong cursor size in math (cursor is at least of
correct size on top-level insets).

I'll commit this unless someone objects.

Andre'
Index: cursor.C
===================================================================
RCS file: /usr/local/lyx/cvsroot/lyx-devel/src/cursor.C,v
retrieving revision 1.117
diff -u -p -r1.117 cursor.C
--- cursor.C    5 Jan 2005 20:21:24 -0000       1.117
+++ cursor.C    9 Jan 2005 19:25:41 -0000
@@ -160,7 +160,6 @@ namespace {
                return false;
        }
 
-
 } // namespace anon
 
 
@@ -192,7 +191,8 @@ void LCursor::setCursor(DocIterator cons
 
 void LCursor::dispatch(FuncRequest const & cmd0)
 {
-       lyxerr[Debug::DEBUG] << "LCursor::dispatch: cmd: " << cmd0 << endl << 
*this << endl;
+       lyxerr[Debug::DEBUG] << "LCursor::dispatch: cmd: "
+               << cmd0 << endl << *this << endl;
        if (empty())
                return;
 
@@ -200,7 +200,8 @@ void LCursor::dispatch(FuncRequest const
        LCursor safe = *this;
 
        for (; size(); pop()) {
-               lyxerr[Debug::DEBUG] << "LCursor::dispatch: cmd: " << cmd0 << 
endl << *this << endl;
+               lyxerr[Debug::DEBUG] << "LCursor::dispatch: cmd: "
+                       << cmd0 << endl << *this << endl;
                BOOST_ASSERT(pos() <= lastpos());
                BOOST_ASSERT(idx() <= lastidx());
                BOOST_ASSERT(pit() <= lastpit());
@@ -304,25 +305,6 @@ int LCursor::currentMode()
 }
 
 
-void LCursor::getDim(int & asc, int & des) const
-{
-       if (inMathed()) {
-               BOOST_ASSERT(inset().asMathInset());
-               //inset().asMathInset()->getCursorDim(asc, des);
-               asc = 10;
-               des = 2;
-       } else if (inTexted()) {
-               LyXFont const & realfont = text()->real_current_font;
-               asc = font_metrics::maxAscent(realfont);
-               des = font_metrics::maxDescent(realfont);
-       } else {
-               lyxerr << "should this happen?" << endl;
-               asc = 10;
-               des = 10;
-       }
-}
-
-
 void LCursor::getPos(int & x, int & y) const
 {
        Point p = bv_funcs::getPos(*this);
@@ -1131,4 +1113,25 @@ void LCursor::needsUpdate()
 void LCursor::noUpdate()
 {
        disp_.update(false);
+}
+
+
+LyXFont LCursor::getFont() const
+{
+       // HACK. far from being perfect...
+       int s = 0;
+       // go up until first non-0 text is hit
+       // (innermost text is 0 in mathed)
+       for (s = size() - 1; s >= 0; --s)
+               if (operator[](s).text())
+                       break;
+       CursorSlice const & sl = operator[](s);
+       LyXText & text = *sl.text();
+       LyXFont font = text.getPar(sl.pit()).getFont(
+               bv().buffer()->params(),
+               sl.pos(),
+               outerFont(sl.pit(), text.paragraphs()));
+       for (; s < size(); ++s)
+               ;
+       return font;
 }
Index: cursor.h
===================================================================
RCS file: /usr/local/lyx/cvsroot/lyx-devel/src/cursor.h,v
retrieving revision 1.69
diff -u -p -r1.69 cursor.h
--- cursor.h    5 Jan 2005 20:21:24 -0000       1.69
+++ cursor.h    9 Jan 2005 19:25:43 -0000
@@ -23,6 +23,7 @@ class BufferView;
 class FuncStatus;
 class FuncRequest;
 class Point;
+class LyXFont;
 
 // these should go
 class MathUnknownInset;
@@ -99,8 +100,6 @@ public:
        bool & macromode() { return macromode_; }
        /// returns x,y position
        void getPos(int & x, int & y) const;
-       /// returns cursor dimension
-       void getDim(int & asc, int & desc) const;
 
        //
        // common part
@@ -275,8 +274,9 @@ public:
        bool openable(MathAtom const &) const;
        ///
        Encoding const * getEncoding() const;
+       /// font at cursor position
+       LyXFont getFont() const;
 };
-
 
 
 #endif // LYXCURSOR_H
Index: BufferView_pimpl.C
===================================================================
RCS file: /usr/local/lyx/cvsroot/lyx-devel/src/BufferView_pimpl.C,v
retrieving revision 1.565
diff -u -p -r1.565 BufferView_pimpl.C
--- BufferView_pimpl.C  6 Jan 2005 16:39:18 -0000       1.565
+++ BufferView_pimpl.C  9 Jan 2005 19:25:52 -0000
@@ -56,6 +56,7 @@
 #include "frontends/Alert.h"
 #include "frontends/Dialogs.h"
 #include "frontends/FileDialog.h"
+#include "frontends/font_metrics.h"
 #include "frontends/LyXView.h"
 #include "frontends/LyXScreenFactory.h"
 #include "frontends/screen.h"
@@ -586,8 +587,9 @@ void BufferView::Pimpl::workAreaResize()
 bool BufferView::Pimpl::fitCursor()
 {
        if (bv_funcs::status(bv_, bv_->cursor()) == bv_funcs::CUR_INSIDE) {
-               int asc, des;
-               bv_->cursor().getDim(asc, des);
+               LyXFont const font = bv_->cursor().getFont();
+               int const asc = font_metrics::maxAscent(font);
+               int const des = font_metrics::maxDescent(font);
                Point p = bv_funcs::getPos(bv_->cursor());
                if (p.y_ - asc >= 0 && p.y_ + des < bv_->workHeight())
                        return false;
Index: frontends/screen.C
===================================================================
RCS file: /usr/local/lyx/cvsroot/lyx-devel/src/frontends/screen.C,v
retrieving revision 1.98
diff -u -p -r1.98 screen.C
--- frontends/screen.C  6 Dec 2004 21:59:23 -0000       1.98
+++ frontends/screen.C  9 Jan 2005 19:25:52 -0000
@@ -174,13 +174,14 @@ void LyXScreen::showCursor(BufferView & 
        if (realfont.language() == latex_language)
                shape = BAR_SHAPE;
 
-       int ascent, descent;
-       bv.cursor().getDim(ascent, descent);
-       int h = ascent + descent;
+       LyXFont const font = bv.cursor().getFont();
+       int const asc = font_metrics::maxAscent(font);
+       int const des = font_metrics::maxDescent(font);
+       int h = asc + des;
        int x = 0;
        int y = 0;
        bv.cursor().getPos(x, y);
-       y -= ascent;
+       y -= asc;
        //lyxerr << "LyXScreen::showCursor x: " << x << " y: " << y << endl;
 
        // if it doesn't touch the screen, don't try to show it

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