#include "InsetMathRoot.h"
-#include "MathData.h"
#include "MathStream.h"
+#include "MathSupport.h"
#include "Cursor.h"
#include "LaTeXFeatures.h"
#include "frontends/Painter.h"
+#include "support/lassert.h"
+#include "support/lstrings.h"
using namespace std;
namespace lyx {
+using namespace frontend;
InsetMathRoot::InsetMathRoot(Buffer * buf)
: InsetMathNest(buf, 2)
}
+void mathed_root_metrics(MetricsInfo & mi, MathData const & nucleus,
+ MathData const * root, Dimension & dim)
+{
+ Changer dummy = mi.base.changeEnsureMath();
+ Dimension dimr;
+ if (root) {
+ Changer script = mi.base.font.changeStyle(SCRIPTSCRIPT_STYLE);
+ // make sure that the dim is high enough for any character
+ root->metrics(mi, dimr, false);
+ }
+
+ Dimension dimn;
+ nucleus.metrics(mi, dimn);
+
+ // Some room for the decoration
+ // The width of left decoration was 9 pixels with a 10em font
+ int const w = 9 * mathed_font_em(mi.base.font) / 10;
+ /* See rule 11 in Appendix G of Rhe TeXbook for the computation of the spacing
+ * above nucleus.
+ * FIXME more work is needed to implement properly rule 11.
+ * * Ideally, we should use sqrt glyphs from the math fonts. Note
+ that then we would get rule thickness from there.
+ * * The positioning of the root MathData is arbitrary. It should
+ * follow the definition of \root...\of... in The Texbook in
+ * Apprendix B page 360.
+ *
+ */
+ int const t = mi.base.solidLineThickness();
+ int const x_height = mathed_font_x_height(mi.base.font);
+ int const phi = (mi.base.font.style() == DISPLAY_STYLE) ? x_height : t;
+ // first part is the spacing, second part is the line width
+ // itself, and last one is the spacing above.
+ int const space_above = (t + phi / 4) + t + t;
+ int const a = dimn.ascent();
+ int const d = dimn.descent();
+ // Not sure what the 1 stands for, it is needed to have some spacing at small sizes.
+ dim.asc = max(dimr.ascent() + (d - a) / 2, a + space_above) + 1;
+ dim.des = max(dimr.descent() - (d - a) / 2, d);
+ dim.wid = max(dimr.width() + 3 * w / 8, w) + dimn.width();
+}
+
+
void InsetMathRoot::metrics(MetricsInfo & mi, Dimension & dim) const
{
- InsetMathNest::metrics(mi);
- Dimension const & dim0 = cell(0).dimension(*mi.base.bv);
- Dimension const & dim1 = cell(1).dimension(*mi.base.bv);
- dim.asc = max(dim0.ascent() + 5, dim1.ascent()) + 2;
- dim.des = max(dim0.descent() - 5, dim1.descent()) + 2;
- dim.wid = dim0.width() + dim1.width() + 10;
- metricsMarkers(mi, dim);
+ mathed_root_metrics(mi, cell(0), &cell(1), dim);
}
-void InsetMathRoot::draw(PainterInfo & pi, int x, int y) const
+void mathed_draw_root(PainterInfo & pi, int x, int y, MathData const & nucleus,
+ MathData const * root, Dimension const & dim)
{
- Dimension const & dim0 = cell(0).dimension(*pi.base.bv);
- int const w = dim0.width();
- // the "exponent"
- cell(0).draw(pi, x, y - 5 - dim0.descent());
- // the "base"
- cell(1).draw(pi, x + w + 8, y);
- Dimension const dim = dimension(*pi.base.bv);
+ Changer dummy = pi.base.changeEnsureMath();
+ // The width of left decoration was 9 pixels with a 10em font
+ int const w = 9 * mathed_font_em(pi.base.font) / 10;
+ // the height of the hook was 5 with a 10em font
+ int const h = 5 * mathed_font_em(pi.base.font) / 10;
int const a = dim.ascent();
int const d = dim.descent();
+ int const t = pi.base.solidLineThickness();
+ Dimension const & dimn = nucleus.dimension(*pi.base.bv);
+ // the width of the left part of the root
+ int const wl = dim.width() - dimn.width();
+ // the "exponent"
+ if (root) {
+ Changer script = pi.base.font.changeStyle(SCRIPTSCRIPT_STYLE);
+ Dimension const & dimr = root->dimension(*pi.base.bv);
+ int const root_offset = wl - 3 * w / 8 - dimr.width();
+ root->draw(pi, x + root_offset, y + (d - a)/2);
+ }
+ // the "base"
+ nucleus.draw(pi, x + wl, y);
int xp[4];
int yp[4];
- pi.pain.line(x + dim.width(), y - a + 1,
- x + w + 4, y - a + 1, pi.base.font.color());
- xp[0] = x + w + 4; yp[0] = y - a + 1;
- xp[1] = x + w; yp[1] = y + d;
- xp[2] = x + w - 2; yp[2] = y + (d - a)/2 + 2;
- xp[3] = x + w - 5; yp[3] = y + (d - a)/2 + 4;
- pi.pain.lines(xp, yp, 4, pi.base.font.color());
- drawMarkers(pi, x, y);
+ pi.pain.line(x + dim.width(), y - a + 2 * t,
+ x + wl, y - a + 2 * t, pi.base.font.color(),
+ Painter::line_solid, t);
+ xp[0] = x + wl; yp[0] = y - a + 2 * t + 1;
+ xp[1] = x + wl - w / 2; yp[1] = y + d;
+ xp[2] = x + wl - w + h / 4; yp[2] = y + d - h;
+ xp[3] = x + wl - w; yp[3] = y + d - h + h / 4;
+ pi.pain.lines(xp, yp, 4, pi.base.font.color(),
+ Painter::fill_none, Painter::line_solid, t);
}
-void InsetMathRoot::write(WriteStream & os) const
+void InsetMathRoot::draw(PainterInfo & pi, int x, int y) const
+{
+ mathed_draw_root(pi, x, y, cell(0), &cell(1), dimension(*pi.base.bv));
+}
+
+
+void InsetMathRoot::write(TeXMathStream & os) const
{
MathEnsurer ensurer(os);
- os << "\\sqrt[" << cell(0) << "]{" << cell(1) << '}';
+ if (os.latex() && !cell(1).empty() && !cell(1).front()->asBraceInset()
+ && support::contains(asString(cell(1)), '['))
+ os << "\\sqrt[{" << cell(1) << "}]{" << cell(0) << '}';
+ else
+ os << "\\sqrt[" << cell(1) << "]{" << cell(0) << '}';
}
void InsetMathRoot::normalize(NormalStream & os) const
{
- os << "[root " << cell(0) << ' ' << cell(1) << ']';
+ os << "[root " << cell(1) << ' ' << cell(0) << ']';
}
bool InsetMathRoot::idxUpDown(Cursor & cur, bool up) const
{
- Cursor::idx_type const target = up ? 0 : 1;
+ idx_type const target = up; //up ? 1 : 0;
if (cur.idx() == target)
return false;
cur.idx() = target;
}
+bool InsetMathRoot::idxForward(Cursor & cur) const
+{
+ // nucleus is 0 and is on the right
+ if (cur.idx() == 0)
+ return false;
+
+ cur.idx() = 0;
+ cur.pos() = 0;
+ return true;
+}
+
+
+bool InsetMathRoot::idxBackward(Cursor & cur) const
+{
+ // nucleus is 0 and is on the right
+ if (cur.idx() == 1)
+ return false;
+
+ cur.idx() = 1;
+ cur.pos() = cur.lastpos();
+ return true;
+}
+
+
+bool InsetMathRoot::idxFirst(Cursor & cur) const
+{
+ LASSERT(&cur.inset() == this, return false);
+ cur.idx() = 1;
+ cur.pos() = 0;
+ return true;
+}
+
+
+bool InsetMathRoot::idxLast(Cursor & cur) const
+{
+ LASSERT(&cur.inset() == this, return false);
+ cur.idx() = 0;
+ cur.pos() = cur.lastpos();
+ return true;
+}
+
+
void InsetMathRoot::maple(MapleStream & os) const
{
- os << '(' << cell(1) << ")^(1/(" << cell(0) <<"))";
+ os << '(' << cell(0) << ")^(1/(" << cell(1) <<"))";
}
void InsetMathRoot::mathematica(MathematicaStream & os) const
{
- os << '(' << cell(1) << ")^(1/(" << cell(0) <<"))";
+ os << '(' << cell(0) << ")^(1/(" << cell(1) <<"))";
}
void InsetMathRoot::octave(OctaveStream & os) const
{
- os << '(' << cell(1) << ")^(1/(" << cell(0) <<"))";
+ os << '(' << cell(0) << ")^(1/(" << cell(1) <<"))";
}
-void InsetMathRoot::mathmlize(MathStream & os) const
+void InsetMathRoot::mathmlize(MathMLStream & ms) const
{
- os << MTag("mroot") << cell(1) << cell(0) << ETag("mroot");
+ ms << MTag("mroot") << cell(0) << cell(1) << ETag("mroot");
}
void InsetMathRoot::htmlize(HtmlStream & os) const
{
os << MTag("span", "class='root'")
- << MTag("sup") << cell(0) << ETag("sup")
- << from_ascii("√")
- << MTag("span", "class='rootof'") << cell(1) << ETag("span")
+ << MTag("sup") << cell(1) << ETag("sup")
+ << from_ascii("√")
+ << MTag("span", "class='rootof'") << cell(0) << ETag("span")
<< ETag("span");
}
projects / lyx.git / blobdiff