X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=src%2Fmathed%2FInsetMathGrid.cpp;h=67300403907d947f43f1ca71e2b75323bf2192e6;hb=cdc847fd304019a19425a0d5d9d42a556a937097;hp=ed77f71f851be12a46fa959b5b0f9c7e81d0defc;hpb=6d75800f5d23f5b051302cb5ff49940748fed4c1;p=lyx.git

diff --git a/src/mathed/InsetMathGrid.cpp b/src/mathed/InsetMathGrid.cpp
index ed77f71f85..6730040390 100644
--- a/src/mathed/InsetMathGrid.cpp
+++ b/src/mathed/InsetMathGrid.cpp
@@ -20,21 +20,22 @@
 #include "MetricsInfo.h"
 
 #include "Buffer.h"
+#include "BufferParams.h"
 #include "BufferView.h"
-#include "CutAndPaste.h"
-#include "FuncStatus.h"
 #include "Cursor.h"
+#include "CutAndPaste.h"
 #include "FuncRequest.h"
+#include "FuncStatus.h"
+#include "LaTeXFeatures.h"
+#include "TexRow.h"
 
 #include "frontends/Clipboard.h"
-#include "frontends/FontMetrics.h"
 #include "frontends/Painter.h"
 
 #include "support/debug.h"
 #include "support/docstream.h"
 #include "support/gettext.h"
 #include "support/lstrings.h"
-
 #include "support/lassert.h"
 
 #include <sstream>
@@ -81,7 +82,7 @@ static void resetGrid(InsetMathGrid & grid)
 
 
 InsetMathGrid::CellInfo::CellInfo()
-	: dummy_(false)
+	: multi_(CELL_NORMAL)
 {}
 
 
@@ -90,16 +91,15 @@ InsetMathGrid::CellInfo::CellInfo()
 
 
 InsetMathGrid::RowInfo::RowInfo()
-	: lines_(0), skip_(0), allow_newpage_(true)
+	: descent_(0), ascent_(0), offset_(0), lines_(0), skip_(0),
+	  allow_newpage_(true)
 {}
 
 
 
 int InsetMathGrid::RowInfo::skipPixels(MetricsInfo const & mi) const
 {
-	frontend::FontMetrics const & fm = theFontMetrics(mi.base.font);
-	return crskip_.inPixels(mi.base.textwidth,
-				fm.width(char_type('M')));
+	return crskip_.inPixels(mi.base);
 }
 
 
@@ -108,7 +108,7 @@ int InsetMathGrid::RowInfo::skipPixels(MetricsInfo const & mi) const
 
 
 InsetMathGrid::ColInfo::ColInfo()
-	: align_('c'), lines_(0)
+	: align_('c'), width_(0), offset_(0), lines_(0), skip_(0)
 {}
 
 
@@ -174,13 +174,15 @@ void InsetMathGrid::setDefaults()
 		colinfo_[col].skip_  = defaultColSpace(col);
 		colinfo_[col].special_.clear();
 	}
+	for (idx_type idx = 0; idx < nargs(); ++idx)
+		cellinfo_[idx].multi_ = CELL_NORMAL;
 }
 
 
 bool InsetMathGrid::interpretString(Cursor & cur, docstring const & str)
 {
 	if (str == "\\hline") {
-		FuncRequest fr = FuncRequest(LFUN_INSET_MODIFY, "tabular add-hline-above");
+		FuncRequest fr = FuncRequest(LFUN_TABULAR_FEATURE, "add-hline-above");
 		FuncStatus status;
 		if (getStatus(cur, fr, status)) {
 			if (status.enabled()) {
@@ -360,6 +362,23 @@ InsetMathGrid::row_type InsetMathGrid::row(idx_type idx) const
 }
 
 
+InsetMathGrid::col_type InsetMathGrid::ncellcols(idx_type idx) const
+{
+	col_type cols = 1;
+	if (cellinfo_[idx].multi_ == CELL_NORMAL)
+		return cols;
+	// If the cell at idx is already CELL_PART_OF_MULTICOLUMN we return
+	// the number of remaining columns, not the ones of the complete
+	// multicolumn cell. This makes it possible to always go to the next
+	// cell with idx + ncellcols(idx) - 1.
+	row_type const r = row(idx);
+	while (idx+cols < nargs() && row(idx+cols) == r &&
+	       cellinfo_[idx+cols].multi_ == CELL_PART_OF_MULTICOLUMN)
+		cols++;
+	return cols;
+}
+
+
 void InsetMathGrid::vcrskip(Length const & crskip, row_type row)
 {
 	rowinfo_[row].crskip_ = crskip;
@@ -375,7 +394,12 @@ Length InsetMathGrid::vcrskip(row_type row) const
 void InsetMathGrid::metrics(MetricsInfo & mi, Dimension & dim) const
 {
 	// let the cells adjust themselves
-	InsetMathNest::metrics(mi);
+	for (idx_type i = 0; i < nargs(); ++i) {
+		if (cellinfo_[i].multi_ != CELL_PART_OF_MULTICOLUMN) {
+			Dimension dimc;
+			cell(i).metrics(mi, dimc);
+		}
+	}
 
 	BufferView & bv = *mi.base.bv;
 
@@ -384,14 +408,16 @@ void InsetMathGrid::metrics(MetricsInfo & mi, Dimension & dim) const
 		int asc  = 0;
 		int desc = 0;
 		for (col_type col = 0; col < ncols(); ++col) {
-			Dimension const & dimc = cell(index(row, col)).dimension(bv);
-			asc  = max(asc,  dimc.asc);
-			desc = max(desc, dimc.des);
+			idx_type const i = index(row, col);
+			if (cellinfo_[i].multi_ != CELL_PART_OF_MULTICOLUMN) {
+				Dimension const & dimc = cell(i).dimension(bv);
+				asc  = max(asc,  dimc.asc);
+				desc = max(desc, dimc.des);
+			}
 		}
 		rowinfo_[row].ascent_  = asc;
 		rowinfo_[row].descent_ = desc;
 	}
-	rowinfo_[0].ascent_       += hlinesep() * rowinfo_[0].lines_;
 	rowinfo_[nrows()].ascent_  = 0;
 	rowinfo_[nrows()].descent_ = 0;
 
@@ -423,26 +449,77 @@ void InsetMathGrid::metrics(MetricsInfo & mi, Dimension & dim) const
 		rowinfo_[row].offset_ -= h;
 
 
+	// multicolumn cell widths, as a map from first column to width in a
+	// vector of last columns.
+	// This is only used if the grid has more than one row, since for
+	// one-row grids multicolumn cells do not need special handling
+	vector<map<col_type, int> > mcolwidths(ncols());
+
 	// compute absolute sizes of horizontal structure
 	for (col_type col = 0; col < ncols(); ++col) {
 		int wid = 0;
-		for (row_type row = 0; row < nrows(); ++row)
-			wid = max(wid, cell(index(row, col)).dimension(bv).wid);
+		for (row_type row = 0; row < nrows(); ++row) {
+			idx_type const i = index(row, col);
+			if (cellinfo_[i].multi_ != CELL_PART_OF_MULTICOLUMN) {
+				int const w = cell(i).dimension(bv).wid;
+				col_type const cols = ncellcols(i);
+				if (cols > 1 && nrows() > 1) {
+					col_type last = col+cols-1;
+					LASSERT(last < ncols(), last = ncols()-1);
+					map<col_type, int>::iterator it =
+						mcolwidths[last].find(col);
+					if (it == mcolwidths[last].end())
+						mcolwidths[last][col] = w;
+					else
+						it->second = max(it->second, w);
+				} else
+					wid = max(wid, w);
+			}
+		}
 		colinfo_[col].width_ = wid;
 	}
 	colinfo_[ncols()].width_  = 0;
 
 	// compute horizontal offsets
-	colinfo_[0].offset_ = border();
+	colinfo_[0].offset_ = border() + colinfo_[0].lines_ * vlinesep();;
 	for (col_type col = 1; col <= ncols(); ++col) {
 		colinfo_[col].offset_ =
 			colinfo_[col - 1].offset_ +
 			colinfo_[col - 1].width_ +
-			colinfo_[col - 1].skip_ +
+			displayColSpace(col - 1) +
 			colsep() +
 			colinfo_[col].lines_ * vlinesep();
 	}
 
+	// increase column widths for multicolumn cells if needed
+	// FIXME: multicolumn lines are not yet considered
+	for (col_type last = 0; last < ncols(); ++last) {
+		map<col_type, int> const & widths = mcolwidths[last];
+		// We increase the width of the last column of the multicol
+		// cell (some sort of left alignment). Since we iterate through
+		// the last and the first columns from left to right, we ensure
+		// that increased widths of previous columns are correctly
+		// taken into account for later columns, thus preventing
+		// unneeded width increasing.
+		for (map<col_type, int>::const_iterator it = widths.begin();
+		     it != widths.end(); ++it) {
+			int const wid = it->second;
+			col_type const first = it->first;
+			int const nextoffset =
+				colinfo_[first].offset_ +
+				wid +
+				displayColSpace(last) +
+				colsep() +
+				colinfo_[last+1].lines_ * vlinesep();
+			int const dx = nextoffset - colinfo_[last+1].offset_;
+			if (dx > 0) {
+				colinfo_[last].width_ += dx;
+				for (col_type col = last + 1; col <= ncols(); ++col)
+					colinfo_[col].offset_ += dx;
+			}
+		}
+	}
+
 
 	dim.wid = colinfo_[ncols() - 1].offset_
 		+ colinfo_[ncols() - 1].width_
@@ -457,7 +534,7 @@ void InsetMathGrid::metrics(MetricsInfo & mi, Dimension & dim) const
 	dim.des = rowinfo_[nrows() - 1].offset_
 		+ rowinfo_[nrows() - 1].descent_
 		+ hlinesep() * rowinfo_[nrows()].lines_
-		+ border();
+		+ border() + 1;
 
 
 /*
@@ -510,71 +587,98 @@ void InsetMathGrid::metrics(MetricsInfo & mi, Dimension & dim) const
 		cxrow->setBaseline(cxrow->getBaseline() - ascent);
 	}
 */
-	metricsMarkers2(dim);
-	// Cache the inset dimension.
-	setDimCache(mi, dim);
+	dim.wid += leftMargin() + rightMargin();
 }
 
 
-void InsetMathGrid::draw(PainterInfo & pi, int x, int y) const
+int InsetMathGrid::vLineHOffset(col_type col, unsigned int line) const
 {
-	drawWithMargin(pi, x, y, 1, 1);
+	if (col < ncols())
+		return leftMargin() + colinfo_[col].offset_
+			- (colinfo_[col].lines_ - line - 1) * vlinesep()
+			- vlinesep()/2 - colsep()/2;
+	else {
+		LASSERT(col == ncols(), return 0);
+		return leftMargin() + colinfo_[col-1].offset_ + colinfo_[col-1].width_
+			+ line * vlinesep()
+			+ vlinesep()/2 + colsep()/2;
+	}
 }
 
 
-void InsetMathGrid::drawWithMargin(PainterInfo & pi, int x, int y,
-	int lmargin, int rmargin) const
+int InsetMathGrid::hLineVOffset(row_type row, unsigned int line) const
 {
-	Dimension const dim = dimension(*pi.base.bv);
-	BufferView const & bv = *pi.base.bv;
+	return rowinfo_[row].offset_
+		- rowinfo_[row].ascent_
+		- line * hlinesep()
+		- hlinesep()/2 - rowsep()/2;
+}
 
-	for (idx_type idx = 0; idx < nargs(); ++idx)
-		cell(idx).draw(pi, x + lmargin + cellXOffset(bv, idx),
-			y + cellYOffset(idx));
 
-	for (row_type row = 0; row <= nrows(); ++row)
-		for (unsigned int i = 0; i < rowinfo_[row].lines_; ++i) {
-			int yy = y + rowinfo_[row].offset_ - rowinfo_[row].ascent_
-				- i * hlinesep() - hlinesep()/2 - rowsep()/2;
-			pi.pain.line(x + lmargin + 1, yy,
-				     x + dim.width() - rmargin - 1, yy,
-				     Color_foreground);
+void InsetMathGrid::draw(PainterInfo & pi, int x, int y) const
+{
+	BufferView const & bv = *pi.base.bv;
+
+	for (idx_type idx = 0; idx < nargs(); ++idx) {
+		if (cellinfo_[idx].multi_ != CELL_PART_OF_MULTICOLUMN) {
+			cell(idx).draw(pi,
+			               x + leftMargin() + cellXOffset(bv, idx),
+			               y + cellYOffset(idx));
+
+			row_type r = row(idx);
+			int const yy1 = y + hLineVOffset(r, 0);
+			int const yy2 = y + hLineVOffset(r + 1, rowinfo_[r + 1].lines_ - 1);
+			auto draw_left_borders = [&](col_type c) {
+				for (unsigned int i = 0; i < colinfo_[c].lines_; ++i) {
+					int const xx = x + vLineHOffset(c, i);
+					pi.pain.line(xx, yy1, xx, yy2, Color_foreground);
+				}
+			};
+			col_type c = col(idx);
+			// Draw inner left borders cell-by-cell because of multicolumns
+			draw_left_borders(c);
+			// Draw the right border (only once)
+			if (c == 0)
+				draw_left_borders(ncols());
 		}
+	}
 
-	for (col_type col = 0; col <= ncols(); ++col)
-		for (unsigned int i = 0; i < colinfo_[col].lines_; ++i) {
-			int xx = x + lmargin + colinfo_[col].offset_
-				- i * vlinesep() - vlinesep()/2 - colsep()/2;
-			pi.pain.line(xx, y - dim.ascent() + 1,
-				     xx, y + dim.descent() - 1,
-				     Color_foreground);
+	// Draw horizontal borders
+	for (row_type r = 0; r <= nrows(); ++r) {
+		int const xx1 = x + vLineHOffset(0, 0);
+		int const xx2 = x + vLineHOffset(ncols(), colinfo_[ncols()].lines_ - 1);
+		for (unsigned int i = 0; i < rowinfo_[r].lines_; ++i) {
+			int const yy = y + hLineVOffset(r, i);
+			pi.pain.line(xx1, yy, xx2, yy, Color_foreground);
 		}
-	drawMarkers2(pi, x, y);
+	}
 }
 
 
 void InsetMathGrid::metricsT(TextMetricsInfo const & mi, Dimension & dim) const
 {
 	// let the cells adjust themselves
-	//InsetMathNest::metrics(mi);
 	for (idx_type i = 0; i < nargs(); ++i)
-		cell(i).metricsT(mi, dim);
+		if (cellinfo_[i].multi_ != CELL_PART_OF_MULTICOLUMN)
+			cell(i).metricsT(mi, dim);
 
 	// compute absolute sizes of vertical structure
 	for (row_type row = 0; row < nrows(); ++row) {
 		int asc  = 0;
 		int desc = 0;
 		for (col_type col = 0; col < ncols(); ++col) {
-			//MathData const & c = cell(index(row, col));
-			// FIXME: BROKEN!
-			Dimension dimc;
-			asc  = max(asc,  dimc.ascent());
-			desc = max(desc, dimc.descent());
+			idx_type const i = index(row, col);
+			if (cellinfo_[i].multi_ != CELL_PART_OF_MULTICOLUMN) {
+				//MathData const & c = cell(i);
+				// FIXME: BROKEN!
+				Dimension dimc;
+				asc  = max(asc,  dimc.ascent());
+				desc = max(desc, dimc.descent());
+			}
 		}
 		rowinfo_[row].ascent_  = asc;
 		rowinfo_[row].descent_ = desc;
 	}
-	//rowinfo_[0].ascent_       += hlinesep() * rowinfo_[0].lines_;
 	rowinfo_[nrows()].ascent_  = 0;
 	rowinfo_[nrows()].descent_ = 0;
 
@@ -611,7 +715,9 @@ void InsetMathGrid::metricsT(TextMetricsInfo const & mi, Dimension & dim) const
 		int wid = 0;
 		for (row_type row = 0; row < nrows(); ++row) {
 			// FIXME: BROKEN!
-			//wid = max(wid, cell(index(row, col)).width());
+			//idx_type const i = index(row, col);
+			//if (cellinfo_[i].multi_ != CELL_PART_OF_MULTICOLUMN)
+			//	wid = max(wid, cell(i).width());
 		}
 		colinfo_[col].width_ = wid;
 	}
@@ -623,7 +729,7 @@ void InsetMathGrid::metricsT(TextMetricsInfo const & mi, Dimension & dim) const
 		colinfo_[col].offset_ =
 			colinfo_[col - 1].offset_ +
 			colinfo_[col - 1].width_ +
-			colinfo_[col - 1].skip_ +
+			displayColSpace(col - 1) +
 			1 ; //colsep() +
 			//colinfo_[col].lines_ * vlinesep();
 	}
@@ -649,7 +755,8 @@ void InsetMathGrid::metricsT(TextMetricsInfo const & mi, Dimension & dim) const
 void InsetMathGrid::drawT(TextPainter & /*pain*/, int /*x*/, int /*y*/) const
 {
 //	for (idx_type idx = 0; idx < nargs(); ++idx)
-//		cell(idx).drawT(pain, x + cellXOffset(idx), y + cellYOffset(idx));
+//		if (cellinfo_[idx].multi_ != CELL_PART_OF_MULTICOLUMN)
+//			cell(idx).drawT(pain, x + cellXOffset(idx), y + cellYOffset(idx));
 }
 
 
@@ -657,7 +764,8 @@ void InsetMathGrid::updateBuffer(ParIterator const & it, UpdateType utype)
 {
 	// pass down
 	for (idx_type idx = 0; idx < nargs(); ++idx)
-		cell(idx).updateBuffer(it, utype);
+		if (cellinfo_[idx].multi_ != CELL_PART_OF_MULTICOLUMN)
+			cell(idx).updateBuffer(it, utype);
 }
 
 
@@ -674,7 +782,7 @@ docstring InsetMathGrid::eolString(row_type row, bool fragile,
 	// make sure an upcoming '[' does not break anything
 	if (row + 1 < nrows()) {
 		MathData const & c = cell(index(row + 1, 0));
-		if (c.size() && c.front()->getChar() == '[')
+		if (!c.empty() && c.front()->getChar() == '[')
 			//eol += "[0pt]";
 			eol += "{}";
 	}
@@ -803,14 +911,16 @@ void InsetMathGrid::swapCol(col_type col)
 
 int InsetMathGrid::cellXOffset(BufferView const & bv, idx_type idx) const
 {
+	if (cellinfo_[idx].multi_ == CELL_PART_OF_MULTICOLUMN)
+		return 0;
 	col_type c = col(idx);
 	int x = colinfo_[c].offset_;
-	char align = displayColAlign(c, row(idx));
+	char align = displayColAlign(idx);
 	Dimension const & celldim = cell(idx).dimension(bv);
 	if (align == 'r' || align == 'R')
-		x += colinfo_[c].width_ - celldim.wid;
+		x += cellWidth(idx) - celldim.wid;
 	if (align == 'c' || align == 'C')
-		x += (colinfo_[c].width_ - celldim.wid) / 2;
+		x += (cellWidth(idx) - celldim.wid) / 2;
 	return x;
 }
 
@@ -821,6 +931,27 @@ int InsetMathGrid::cellYOffset(idx_type idx) const
 }
 
 
+int InsetMathGrid::cellWidth(idx_type idx) const
+{
+	switch (cellinfo_[idx].multi_) {
+	case CELL_NORMAL:
+		return colinfo_[col(idx)].width_;
+	case CELL_BEGIN_OF_MULTICOLUMN: {
+		col_type c1 = col(idx);
+		col_type c2 = c1 + ncellcols(idx);
+		return colinfo_[c2].offset_
+			- colinfo_[c1].offset_
+			- displayColSpace(c2)
+			- colsep()
+			- colinfo_[c2].lines_ * vlinesep();
+	}
+	case CELL_PART_OF_MULTICOLUMN:
+		return 0;
+	}
+	return 0;
+}
+
+
 bool InsetMathGrid::idxUpDown(Cursor & cur, bool up) const
 {
 	if (up) {
@@ -832,6 +963,11 @@ bool InsetMathGrid::idxUpDown(Cursor & cur, bool up) const
 			return false;
 		cur.idx() += ncols();
 	}
+	// If we are in a multicolumn cell, move to the "real" cell
+	while (cellinfo_[cur.idx()].multi_ == CELL_PART_OF_MULTICOLUMN) {
+		LASSERT(cur.idx() > 0, return false);
+		--cur.idx();
+	}
 	cur.pos() = cur.cell().x2pos(&cur.bv(), cur.x_target() - cur.cell().xo(cur.bv()));
 	return true;
 }
@@ -843,6 +979,11 @@ bool InsetMathGrid::idxBackward(Cursor & cur) const
 	if (cur.col() == 0)
 		return false;
 	--cur.idx();
+	// If we are in a multicolumn cell, move to the "real" cell
+	while (cellinfo_[cur.idx()].multi_ == CELL_PART_OF_MULTICOLUMN) {
+		LASSERT(cur.idx() > 0, return false);
+		--cur.idx();
+	}
 	cur.pos() = cur.lastpos();
 	return true;
 }
@@ -854,6 +995,13 @@ bool InsetMathGrid::idxForward(Cursor & cur) const
 	if (cur.col() + 1 == ncols())
 		return false;
 	++cur.idx();
+	// If we are in a multicolumn cell, move to the next cell
+	while (cellinfo_[cur.idx()].multi_ == CELL_PART_OF_MULTICOLUMN) {
+		// leave matrix if at the back edge
+		if (cur.col() + 1 == ncols())
+			return false;
+		++cur.idx();
+	}
 	cur.pos() = 0;
 	return true;
 }
@@ -871,6 +1019,11 @@ bool InsetMathGrid::idxFirst(Cursor & cur) const
 		default:
 			cur.idx() = ((nrows() - 1) / 2) * ncols();
 	}
+	// If we are in a multicolumn cell, move to the "real" cell
+	while (cellinfo_[cur.idx()].multi_ == CELL_PART_OF_MULTICOLUMN) {
+		LASSERT(cur.idx() > 0, return false);
+		--cur.idx();
+	}
 	cur.pos() = 0;
 	return true;
 }
@@ -888,6 +1041,11 @@ bool InsetMathGrid::idxLast(Cursor & cur) const
 		default:
 			cur.idx() = ((nrows() - 1) / 2 + 1) * ncols() - 1;
 	}
+	// If we are in a multicolumn cell, move to the "real" cell
+	while (cellinfo_[cur.idx()].multi_ == CELL_PART_OF_MULTICOLUMN) {
+		LASSERT(cur.idx() > 0, return false);
+		--cur.idx();
+	}
 	cur.pos() = cur.lastpos();
 	return true;
 }
@@ -905,7 +1063,7 @@ bool InsetMathGrid::idxDelete(idx_type & idx)
 
 	// try to delete entire sequence of ncols() empty cells if possible
 	for (idx_type i = idx; i < idx + ncols(); ++i)
-		if (cell(i).size())
+		if (!cell(i).empty())
 			return false;
 
 	// move cells if necessary
@@ -938,9 +1096,15 @@ void InsetMathGrid::idxGlue(idx_type idx)
 			delRow(row(idx) + 1);
 		}
 	} else {
-		cell(idx).append(cell(idx + 1));
+		idx_type idx_next = idx + 1;
+		while (idx_next < nargs() &&
+		       cellinfo_[idx_next].multi_ == CELL_PART_OF_MULTICOLUMN)
+			++idx_next;
+		if (idx_next < nargs())
+			cell(idx).append(cell(idx_next));
+		col_type oldcol = c + 1;
 		for (col_type cc = c + 2; cc < ncols(); ++cc)
-			cell(idx - c + cc - 1) = cell(idx - c + cc);
+			cell(idx - oldcol + cc) = cell(idx - oldcol + 1 + cc);
 		cell(idx - c + ncols() - 1).clear();
 	}
 }
@@ -970,14 +1134,26 @@ bool InsetMathGrid::idxBetween(idx_type idx, idx_type from, idx_type to) const
 }
 
 
-
 void InsetMathGrid::normalize(NormalStream & os) const
 {
 	os << "[grid ";
 	for (row_type row = 0; row < nrows(); ++row) {
 		os << "[row ";
-		for (col_type col = 0; col < ncols(); ++col)
-			os << "[cell " << cell(index(row, col)) << ']';
+		for (col_type col = 0; col < ncols(); ++col) {
+			idx_type const i = index(row, col);
+			switch (cellinfo_[i].multi_) {
+			case CELL_NORMAL:
+				os << "[cell " << cell(i) << ']';
+				break;
+			case CELL_BEGIN_OF_MULTICOLUMN:
+				os << "[cell colspan="
+				   << static_cast<int>(ncellcols(i)) << ' '
+				   << cell(i) << ']';
+				break;
+			case CELL_PART_OF_MULTICOLUMN:
+				break;
+			}
+		}
 		os << ']';
 	}
 	os << ']';
@@ -994,9 +1170,16 @@ void InsetMathGrid::mathmlize(MathStream & os) const
 		if (havetable)
 			os << MTag("mtr");
 		for (col_type col = 0; col < ncols(); ++col) {
-			os << MTag(celltag);
-			os << cell(index(row, col));
-			os << ETag(celltag);
+			idx_type const i = index(row, col);
+			if (cellinfo_[i].multi_ != CELL_PART_OF_MULTICOLUMN) {
+				col_type const cellcols = ncellcols(i);
+				ostringstream attr;
+				if (havetable && cellcols > 1)
+					attr << "colspan='" << cellcols << '\'';
+				os << MTag(celltag, attr.str());
+				os << cell(index(row, col));
+				os << ETag(celltag);
+			}
 		}
 		if (havetable)
 			os << ETag("mtr");
@@ -1019,9 +1202,16 @@ void InsetMathGrid::htmlize(HtmlStream & os, string attrib) const
 	for (row_type row = 0; row < nrows(); ++row) {
 		os << MTag("tr");
 		for (col_type col = 0; col < ncols(); ++col) {
-			os << MTag("td");
-			os << cell(index(row, col));
-			os << ETag("td");
+			idx_type const i = index(row, col);
+			if (cellinfo_[i].multi_ != CELL_PART_OF_MULTICOLUMN) {
+				col_type const cellcols = ncellcols(i);
+				ostringstream attr;
+				if (cellcols > 1)
+					attr << "colspan='" << cellcols << '\'';
+				os << MTag("td", attr.str());
+				os << cell(index(row, col));
+				os << ETag("td");
+			}
 		}
 		os << ETag("tr");
 	}
@@ -1035,6 +1225,20 @@ void InsetMathGrid::htmlize(HtmlStream & os) const
 }
 
 
+void InsetMathGrid::validate(LaTeXFeatures & features) const
+{
+	if (features.runparams().math_flavor == OutputParams::MathAsHTML
+	    && (nrows() > 1 || ncols() > 1)) {
+		// CSS taken from InsetMathCases
+		features.addCSSSnippet(
+			"table.mathtable{display: inline-block; text-align: center; border: none;"
+			"border-left: thin solid black; vertical-align: middle; padding-left: 0.5ex;}\n"
+			"table.mathtable td {text-align: left; border: none;}");
+	}
+	InsetMathNest::validate(features);
+}
+
+
 void InsetMathGrid::write(WriteStream & os) const
 {
 	write(os, 0, 0, nrows(), ncols());
@@ -1054,19 +1258,43 @@ void InsetMathGrid::write(WriteStream & os,
 		bool emptyline = true;
 		bool last_eoln = true;
 		for (col_type col = beg_col; col < end_col; ++col) {
-			bool const empty_cell = cell(index(row, col)).empty();
-			if (!empty_cell)
+			idx_type const idx = index(row, col);
+			bool const empty_cell = cell(idx).empty();
+			if (!empty_cell || cellinfo_[idx].multi_ != CELL_NORMAL)
 				last_eoln = false;
-			if (!empty_cell || colinfo_[col + 1].lines_) {
+			if (!empty_cell || cellinfo_[idx].multi_ != CELL_NORMAL ||
+			    colinfo_[col + 1].lines_) {
 				lastcol = col + 1;
 				emptyline = false;
 			}
 		}
-		for (col_type col = beg_col; col < lastcol; ++col) {
-			os << cell(index(row, col));
+		for (col_type col = beg_col; col < end_col;) {
+			int nccols = 1;
+			idx_type const idx = index(row, col);
+			TexRow::RowEntry entry = TexRow::mathEntry(id(),idx);
+			os.texrow().start(entry);
+			if (col >= lastcol) {
+				++col;
+				continue;
+			}
+			Changer dummy = os.changeRowEntry(entry);
+			if (cellinfo_[idx].multi_ == CELL_BEGIN_OF_MULTICOLUMN) {
+				size_t s = col + 1;
+				while (s < ncols() &&
+				       cellinfo_[index(row, s)].multi_ == CELL_PART_OF_MULTICOLUMN)
+					s++;
+				nccols = s - col;
+				os << "\\multicolumn{" << nccols
+				   << "}{" << cellinfo_[idx].align_
+				   << "}{";
+			}
+			os << cell(idx);
 			if (os.pendingBrace())
 				ModeSpecifier specifier(os, TEXT_MODE);
-			os << eocString(col, lastcol);
+			if (cellinfo_[idx].multi_ == CELL_BEGIN_OF_MULTICOLUMN)
+				os << '}';
+			os << eocString(col + nccols - 1, lastcol);
+			col += nccols;
 		}
 		eol = eolString(row, os.fragile(), os.latex(), last_eoln);
 		os << eol;
@@ -1127,11 +1355,35 @@ void InsetMathGrid::splitCell(Cursor & cur)
 	ar.erase(0, cur.pos());
 	cur.cell().erase(cur.pos(), cur.lastpos());
 	++cur.idx();
+	while (cur.idx() << nargs() &&
+	       cellinfo_[cur.idx()].multi_ == CELL_BEGIN_OF_MULTICOLUMN)
+		++cur.idx();
 	cur.pos() = 0;
 	cur.cell().insert(0, ar);
 }
 
 
+char InsetMathGrid::displayColAlign(idx_type idx) const
+{
+	if (cellinfo_[idx].multi_ == CELL_BEGIN_OF_MULTICOLUMN) {
+		// align_ may also contain lines like "||r|", so this is
+		// not complete, but we catch at least the simple cases.
+		if (cellinfo_[idx].align_ == "c")
+			return 'c';
+		if (cellinfo_[idx].align_ == "l")
+			return 'l';
+		if (cellinfo_[idx].align_ == "r")
+			return 'r';
+	}
+	return colinfo_[col(idx)].align_;
+}
+
+
+int InsetMathGrid::displayColSpace(col_type col) const
+{
+	return colinfo_[col].skip_;
+}
+
 void InsetMathGrid::doDispatch(Cursor & cur, FuncRequest & cmd)
 {
 	//lyxerr << "*** InsetMathGrid: request: " << cmd << endl;
@@ -1142,7 +1394,7 @@ void InsetMathGrid::doDispatch(Cursor & cur, FuncRequest & cmd)
 	switch (act) {
 
 	// insert file functions
-	case LFUN_LINE_DELETE:
+	case LFUN_LINE_DELETE_FORWARD:
 		cur.recordUndoInset();
 		//autocorrect_ = false;
 		//macroModeClose();
@@ -1165,7 +1417,7 @@ void InsetMathGrid::doDispatch(Cursor & cur, FuncRequest & cmd)
 
 	case LFUN_CELL_BACKWARD:
 		// See below.
-		cur.setSelection(false);
+		cur.selection(false);
 		if (!idxPrev(cur)) {
 			cmd = FuncRequest(LFUN_FINISHED_BACKWARD);
 			cur.undispatched();
@@ -1175,7 +1427,7 @@ void InsetMathGrid::doDispatch(Cursor & cur, FuncRequest & cmd)
 	case LFUN_CELL_FORWARD:
 		// Can't handle selection by additional 'shift' as this is
 		// hard bound to LFUN_CELL_BACKWARD
-		cur.setSelection(false);
+		cur.selection(false);
 		if (!idxNext(cur)) {
 			cmd = FuncRequest(LFUN_FINISHED_FORWARD);
 			cur.undispatched();
@@ -1193,7 +1445,8 @@ void InsetMathGrid::doDispatch(Cursor & cur, FuncRequest & cmd)
 
 		// split cell
 		splitCell(cur);
-		swap(cell(cur.idx()), cell(cur.idx() + ncols() - 1));
+		if (ncols() > 1)
+			swap(cell(cur.idx()), cell(cur.idx() + ncols() - 1));
 		if (cur.idx() > 0)
 			--cur.idx();
 		cur.pos() = cur.lastpos();
@@ -1203,17 +1456,12 @@ void InsetMathGrid::doDispatch(Cursor & cur, FuncRequest & cmd)
 		break;
 	}
 
-	case LFUN_INSET_MODIFY: {
+	case LFUN_TABULAR_FEATURE: {
 		cur.recordUndoInset();
 		//lyxerr << "handling tabular-feature " << to_utf8(cmd.argument()) << endl;
 		istringstream is(to_utf8(cmd.argument()));
 		string s;
 		is >> s;
-		if (s != "tabular") {
-			InsetMathNest::doDispatch(cur, cmd);
-			return;
-		}
-		is >> s;
 		if (s == "valign-top")
 			setVerticalAlignment('t');
 		else if (s == "valign-middle")
@@ -1302,7 +1550,7 @@ void InsetMathGrid::doDispatch(Cursor & cur, FuncRequest & cmd)
 			docstring & special = colinfo_[cur.col()].special_;
 			if (!special.empty()) {
 				docstring::size_type i = special.rfind('|');
-				LASSERT(i != docstring::npos, /**/);
+				LASSERT(i != docstring::npos, break);
 				special.erase(i, 1);
 			}
 		}
@@ -1311,7 +1559,7 @@ void InsetMathGrid::doDispatch(Cursor & cur, FuncRequest & cmd)
 			docstring & special = colinfo_[cur.col()+1].special_;
 			if (!special.empty()) {
 				docstring::size_type i = special.find('|');
-				LASSERT(i != docstring::npos, /**/);
+				LASSERT(i != docstring::npos, break);
 				special.erase(i, 1);
 			}
 		}
@@ -1328,35 +1576,35 @@ void InsetMathGrid::doDispatch(Cursor & cur, FuncRequest & cmd)
 		parseflg |= Parse::VERBATIM;
 		// fall through
 	case LFUN_PASTE: {
-		if (cur.currentMode() <= TEXT_MODE)
+		if (cur.currentMode() != MATH_MODE)
 			parseflg |= Parse::TEXTMODE;
 		cur.message(_("Paste"));
 		cap::replaceSelection(cur);
 		docstring topaste;
 		if (cmd.argument().empty() && !theClipboard().isInternal())
-			topaste = theClipboard().getAsText();
+			topaste = theClipboard().getAsText(frontend::Clipboard::PlainTextType);
 		else {
 			idocstringstream is(cmd.argument());
 			int n = 0;
 			is >> n;
-			topaste = cap::selection(n);
+			topaste = cap::selection(n, buffer().params().documentClassPtr());
 		}
 		InsetMathGrid grid(buffer_, 1, 1);
 		if (!topaste.empty())
-			if ((topaste.size() == 1 && topaste.at(0) < 0x80)
+			if ((topaste.size() == 1 && isAscii(topaste))
 			    || !mathed_parse_normal(grid, topaste, parseflg)) {
 				resetGrid(grid);
 				mathed_parse_normal(grid, topaste, parseflg | Parse::VERBATIM);
 			}
 
 		bool hline_enabled = false;
-		FuncRequest fr = FuncRequest(LFUN_INSET_MODIFY, "tabular add-hline-above");
+		FuncRequest fr = FuncRequest(LFUN_TABULAR_FEATURE, "add-hline-above");
 		FuncStatus status;
 		if (getStatus(cur, fr, status))
 			hline_enabled = status.enabled();
 		if (grid.nargs() == 1) {
 			// single cell/part of cell
-			cur.recordUndo();
+			cur.recordUndoInset();
 			cur.cell().insert(cur.pos(), grid.cell(0));
 			cur.pos() += grid.cell(0).size();
 			if (hline_enabled)
@@ -1417,12 +1665,10 @@ void InsetMathGrid::doDispatch(Cursor & cur, FuncRequest & cmd)
 		break;
 	}
 
-	case LFUN_LINE_BEGIN_SELECT:
 	case LFUN_LINE_BEGIN:
-	case LFUN_WORD_BACKWARD_SELECT:
-	case LFUN_WORD_BACKWARD:
-	case LFUN_WORD_LEFT_SELECT:
-	case LFUN_WORD_LEFT:
+		cur.screenUpdateFlags(Update::Decoration | Update::FitCursor);
+		// fall through
+	case LFUN_LINE_BEGIN_SELECT:
 		cur.selHandle(act == LFUN_WORD_BACKWARD_SELECT ||
 				act == LFUN_WORD_LEFT_SELECT ||
 				act == LFUN_LINE_BEGIN_SELECT);
@@ -1441,12 +1687,10 @@ void InsetMathGrid::doDispatch(Cursor & cur, FuncRequest & cmd)
 		}
 		break;
 
-	case LFUN_WORD_FORWARD_SELECT:
-	case LFUN_WORD_FORWARD:
-	case LFUN_WORD_RIGHT_SELECT:
-	case LFUN_WORD_RIGHT:
-	case LFUN_LINE_END_SELECT:
 	case LFUN_LINE_END:
+		cur.screenUpdateFlags(Update::Decoration | Update::FitCursor);
+		// fall through
+	case LFUN_LINE_END_SELECT:
 		cur.selHandle(act == LFUN_WORD_FORWARD_SELECT ||
 				act == LFUN_WORD_RIGHT_SELECT ||
 				act == LFUN_LINE_END_SELECT);
@@ -1476,14 +1720,8 @@ bool InsetMathGrid::getStatus(Cursor & cur, FuncRequest const & cmd,
 		FuncStatus & status) const
 {
 	switch (cmd.action()) {
-	case LFUN_INSET_MODIFY: {
-		istringstream is(to_utf8(cmd.argument()));
-		string s;
-		is >> s;
-		if (s != "tabular") {
-			// We only now about table actions here.
-			break;
-		}
+	case LFUN_TABULAR_FEATURE: {
+		string s = cmd.getArg(0);
 		if (&cur.inset() != this) {
 			// Table actions requires that the cursor is _inside_ the
 			// table.
@@ -1491,7 +1729,6 @@ bool InsetMathGrid::getStatus(Cursor & cur, FuncRequest const & cmd,
 			status.message(from_utf8(N_("Cursor not in table")));
 			return true;
 		}
-		is >> s;
 		if (nrows() <= 1 && (s == "delete-row" || s == "swap-row")) {
 			status.setEnabled(false);
 			status.message(from_utf8(N_("Only one row")));
@@ -1546,7 +1783,8 @@ bool InsetMathGrid::getStatus(Cursor & cur, FuncRequest const & cmd,
 		} else {
 			status.setEnabled(false);
 			status.message(bformat(
-				from_utf8(N_("Unknown tabular feature '%1$s'")), lyx::from_ascii(s)));
+			    from_utf8(N_("Unknown tabular feature '%1$s'")),
+			    from_utf8(s)));
 		}
 
 #if 0
@@ -1587,4 +1825,69 @@ bool InsetMathGrid::getStatus(Cursor & cur, FuncRequest const & cmd,
 }
 
 
+// static
+char InsetMathGrid::colAlign(HullType type, col_type col)
+{
+	switch (type) {
+	case hullEqnArray:
+		return "rcl"[col % 3];
+
+	case hullMultline:
+	case hullGather:
+		return 'c';
+
+	case hullAlign:
+	case hullAlignAt:
+	case hullXAlignAt:
+	case hullXXAlignAt:
+	case hullFlAlign:
+		return "rl"[col & 1];
+
+	case hullUnknown:
+	case hullNone:
+	case hullSimple:
+	case hullEquation:
+	case hullRegexp:
+		return 'c';
+	}
+	// avoid warning
+	return 'c';
+}
+
+
+//static
+int InsetMathGrid::colSpace(HullType type, col_type col)
+{
+	int alignInterSpace = 0;
+	switch (type) {
+	case hullUnknown:
+	case hullNone:
+	case hullSimple:
+	case hullEquation:
+	case hullMultline:
+	case hullGather:
+	case hullRegexp:
+		return 0;
+
+	case hullEqnArray:
+		return 5;
+
+	case hullAlign:
+		alignInterSpace = 20;
+		break;
+	case hullAlignAt:
+		alignInterSpace = 0;
+		break;
+	case hullXAlignAt:
+		alignInterSpace = 40;
+		break;
+	case hullXXAlignAt:
+	case hullFlAlign:
+		alignInterSpace = 60;
+		break;
+	}
+	return (col % 2) ? alignInterSpace : 0;
+}
+
+
 } // namespace lyx