X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=src%2FRow.cpp;h=57f02e2987867729d1643f70b976202944a9bec6;hb=0933df00113ee2735699c13559ad3b6e7e9fd115;hp=317244a792fdad5b615da9361a10bf6e0307cc21;hpb=150cf11651ad92090a452bb9e6cb72d7eea886d5;p=lyx.git

diff --git a/src/Row.cpp b/src/Row.cpp
index 317244a792..57f02e2987 100644
--- a/src/Row.cpp
+++ b/src/Row.cpp
@@ -3,11 +3,11 @@
  * This file is part of LyX, the document processor.
  * Licence details can be found in the file COPYING.
  *
- * \author unknown
- * \author Lars Gullik Bjønnes
+ * \author Lars Gullik Bjønnes
  * \author John Levon
- * \author André Pönitz
- * \author Jürgen Vigna
+ * \author André Pönitz
+ * \author Jürgen Vigna
+ * \author Jean-Marc Lasgouttes
  *
  * Full author contact details are available in file CREDITS.
  *
@@ -17,21 +17,123 @@
 #include <config.h>
 
 #include "Row.h"
-#include "debug.h"
 
+#include "DocIterator.h"
+
+#include "frontends/FontMetrics.h"
+
+#include "support/debug.h"
+#include "support/lassert.h"
+#include "support/lyxalgo.h"
+
+#include <ostream>
+
+using namespace std;
 
 namespace lyx {
 
+using frontend::FontMetrics;
 
-Row::Row()
-	: separator(0), hfill(0), label_hfill(0), x(0),
-	sel_beg(-1), sel_end(-1), changed_(false), crc_(0), pos_(0), end_(0)
-{}
+double Row::Element::pos2x(pos_type const i) const
+{
+	// This can happen with inline completion when clicking on the
+	// row after the completion.
+	if (i < pos || i > endpos)
+		return 0;
+
+	bool const rtl = font.isVisibleRightToLeft();
+
+	double w = 0;
+	//handle first the two bounds of the element
+	if (i == endpos && type != VIRTUAL
+		&& !(inset && inset->lyxCode() == SEPARATOR_CODE))
+		w = rtl ? 0 : full_width();
+	else if (i == pos || type != STRING)
+		w = rtl ? full_width() : 0;
+	else {
+		FontMetrics const & fm = theFontMetrics(font);
+		w = fm.pos2x(str, i - pos, font.isVisibleRightToLeft());
+	}
+
+	return w;
+}
+
+
+pos_type Row::Element::x2pos(int &x) const
+{
+	//lyxerr << "x2pos: x=" << x << " w=" << width() << " " << *this;
+	bool const rtl = font.isVisibleRightToLeft();
+	size_t i = 0;
+
+	switch (type) {
+	case STRING: {
+		FontMetrics const & fm = theFontMetrics(font);
+		i = fm.x2pos(str, x, rtl);
+		break;
+	}
+	case VIRTUAL:
+		// those elements are actually empty (but they have a width)
+		i = 0;
+		x = rtl ? int(full_width()) : 0;
+		break;
+	case SEPARATOR:
+	case INSET:
+	case SPACE:
+		// those elements contain only one position. Round to
+		// the closest side.
+		if (x > full_width()) {
+			x = int(full_width());
+			i = !rtl;
+		} else {
+			x = 0;
+			i = rtl;
+		}
+
+	}
+	//lyxerr << "=> p=" << pos + i << " x=" << x << endl;
+	return pos + i;
+
+}
+
+
+bool Row::Element::breakAt(int w)
+{
+	if (type != STRING || dim.wid <= w)
+		return false;
+
+	bool const rtl = font.isVisibleRightToLeft();
+	if (rtl)
+		w = dim.wid - w;
+	pos_type new_pos = x2pos(w);
+	if (new_pos == pos)
+		return false;
+	str = str.substr(0, new_pos - pos);
+	if (rtl)
+		dim.wid -= w;
+	else
+		dim.wid = w;
+	endpos = new_pos;
+	return true;
+}
 
 
-Row::Row(pos_type pos)
-	: separator(0), hfill(0), label_hfill(0), x(0),
-	sel_beg(-1), sel_end(-1), changed_(false), crc_(0), pos_(pos), end_(0)
+pos_type Row::Element::left_pos() const
+{
+	return font.isVisibleRightToLeft() ? endpos : pos;
+}
+
+
+pos_type Row::Element::right_pos() const
+{
+	return font.isVisibleRightToLeft() ? pos : endpos;
+}
+
+
+Row::Row()
+	: separator(0), label_hfill(0), left_margin(0), right_margin(0),
+	  sel_beg(-1), sel_end(-1),
+	  begin_margin_sel(false), end_margin_sel(false),
+	  changed_(false), crc_(0), pos_(0), end_(0), right_boundary_(false)
 {}
 
 
@@ -42,25 +144,47 @@ void Row::setCrc(size_type crc) const
 }
 
 
-void Row::setDimension(Dimension const & dim)
+bool Row::isMarginSelected(bool left_margin, DocIterator const & beg,
+		DocIterator const & end) const
 {
-	dim_ = dim;
-}
-
+	pos_type const sel_pos = left_margin ? sel_beg : sel_end;
+	pos_type const margin_pos = left_margin ? pos_ : end_;
 
-void Row::pos(pos_type p)
-{
-	pos_ = p;
+	// Is the chosen margin selected ?
+	if (sel_pos == margin_pos) {
+		if (beg.pos() == end.pos())
+			// This is a special case in which the space between after
+			// pos i-1 and before pos i is selected, i.e. the margins
+			// (see DocIterator::boundary_).
+			return beg.boundary() && !end.boundary();
+		else if (end.pos() == margin_pos)
+			// If the selection ends around the margin, it is only
+			// drawn if the cursor is after the margin.
+			return !end.boundary();
+		else if (beg.pos() == margin_pos)
+			// If the selection begins around the margin, it is
+			// only drawn if the cursor is before the margin.
+			return beg.boundary();
+		else
+			return true;
+	}
+	return false;
 }
 
 
-void Row::endpos(pos_type p)
+void Row::setSelectionAndMargins(DocIterator const & beg,
+		DocIterator const & end) const
 {
-	end_ = p;
+	setSelection(beg.pos(), end.pos());
+
+	if (selection()) {
+		end_margin_sel = isMarginSelected(false, beg, end);
+		begin_margin_sel = isMarginSelected(true, beg, end);
+	}
 }
 
 
-void Row::setSelection(pos_type beg, pos_type end)
+void Row::setSelection(pos_type beg, pos_type end) const
 {
 	if (pos_ >= beg && pos_ <= end)
 		sel_beg = pos_;
@@ -78,13 +202,243 @@ void Row::setSelection(pos_type beg, pos_type end)
 }
 
 
-void Row::dump(char const * s) const
+bool Row::selection() const
+{
+	return sel_beg != -1 && sel_end != -1;
+}
+
+
+ostream & operator<<(ostream & os, Row::Element const & e)
+{
+	if (e.font.isVisibleRightToLeft())
+		os << e.endpos << "<<" << e.pos << " ";
+	else
+		os << e.pos << ">>" << e.endpos << " ";
+
+	switch (e.type) {
+	case Row::STRING:
+		os << "STRING: `" << to_utf8(e.str) << "', ";
+		break;
+	case Row::VIRTUAL:
+		os << "VIRTUAL: `" << to_utf8(e.str) << "', ";
+		break;
+	case Row::INSET:
+		os << "INSET: " << to_utf8(e.inset->layoutName()) << ", ";
+		break;
+	case Row::SEPARATOR:
+		os << "SEPARATOR: extra=" << e.extra << ", ";
+		break;
+	case Row::SPACE:
+		os << "SPACE: ";
+		break;
+	}
+	os << "width=" << e.full_width();
+	return os;
+}
+
+
+ostream & operator<<(ostream & os, Row const & row)
 {
-	LYXERR0(s << " pos: " << pos_ << " end: " << end_
-		<< " width: " << dim_.wid
-		<< " ascent: " << dim_.asc
-		<< " descent: " << dim_.des);
+	os << " pos: " << row.pos_ << " end: " << row.end_
+	   << " left_margin: " << row.left_margin
+	   << " width: " << row.dim_.wid
+	   << " right_margin: " << row.right_margin
+	   << " ascent: " << row.dim_.asc
+	   << " descent: " << row.dim_.des
+	   << " separator: " << row.separator
+	   << " label_hfill: " << row.label_hfill 
+	   << " row_boundary: " << row.right_boundary() << "\n";
+	double x = row.left_margin;
+	Row::Elements::const_iterator it = row.elements_.begin();
+	for ( ; it != row.elements_.end() ; ++it) {
+		os << "x=" << x << " => " << *it << endl;
+		x += it->full_width();
+	}
+	return os;
 }
 
 
+bool Row::sameString(Font const & f, Change const & ch) const
+{
+	if (elements_.empty())
+		return false;
+	Element const & elt = elements_.back();
+	return elt.type == STRING && !elt.final
+		   && elt.font == f && elt.change == ch;
+}
+
+
+void Row::finalizeLast()
+{
+	if (elements_.empty())
+		return;
+	Element & elt = elements_.back();
+	if (elt.final)
+		return;
+	elt.final = true;
+
+	if (elt.type == STRING) {
+		elt.dim.wid = theFontMetrics(elt.font).width(elt.str);
+		dim_.wid += elt.dim.wid;
+	}
+}
+
+
+void Row::add(pos_type const pos, Inset const * ins, Dimension const & dim,
+	      Font const & f, Change const & ch)
+{
+	finalizeLast();
+	Element e(INSET, pos, f, ch);
+	e.inset = ins;
+	e.dim = dim;
+	elements_.push_back(e);
+	dim_.wid += dim.wid;
+}
+
+
+void Row::add(pos_type const pos, char_type const c,
+	      Font const & f, Change const & ch)
+{
+	if (!sameString(f, ch)) {
+		finalizeLast();
+		Element e(STRING, pos, f, ch);
+		elements_.push_back(e);
+	}
+	back().str += c;
+	back().endpos = pos + 1;
+}
+
+
+void Row::addVirtual(pos_type const pos, docstring const & s,
+		     Font const & f, Change const & ch)
+{
+	finalizeLast();
+	Element e(VIRTUAL, pos, f, ch);
+	e.str = s;
+	e.dim.wid = theFontMetrics(f).width(s);
+	dim_.wid += e.dim.wid;
+	e.endpos = pos;
+	elements_.push_back(e);
+	finalizeLast();
+}
+
+
+void Row::addSeparator(pos_type const pos, char_type const c,
+		       Font const & f, Change const & ch)
+{
+	finalizeLast();
+	Element e(SEPARATOR, pos, f, ch);
+	e.str += c;
+	e.dim.wid = theFontMetrics(f).width(c);
+	elements_.push_back(e);
+	dim_.wid += e.dim.wid;
+}
+
+
+void Row::addSpace(pos_type const pos, int const width,
+		   Font const & f, Change const & ch)
+{
+	finalizeLast();
+	Element e(SPACE, pos, f, ch);
+	e.dim.wid = width;
+	elements_.push_back(e);
+	dim_.wid += e.dim.wid;
+}
+
+
+void Row::pop_back()
+{
+	dim_.wid -= elements_.back().dim.wid;
+	elements_.pop_back();
+}
+
+
+void Row::shortenIfNeeded(pos_type const keep, int const w)
+{
+	if (empty() || width() <= w)
+		return;
+
+	Elements::iterator const beg = elements_.begin();
+	Elements::iterator const end = elements_.end();
+	Elements::iterator last_sep = elements_.end();
+	int last_width = 0;
+	int wid = left_margin;
+
+	Elements::iterator cit = beg;
+	for ( ; cit != end ; ++cit) {
+		if (cit->type == SEPARATOR && cit->pos >= keep) {
+			last_sep = cit;
+			last_width = wid;
+		}
+		if (wid + cit->dim.wid > w)
+			break;
+		wid += cit->dim.wid;
+	}
+
+	if (last_sep != end) {
+		// We have found a suitable separator. This is the
+		// common case.
+		end_ = last_sep->endpos;
+		dim_.wid = last_width;
+		elements_.erase(last_sep, end);
+		return;
+	}
+
+	if (cit == end) {
+		// This should not happen since the row is too long.
+		LYXERR0("Something is wrong cannot shorten row: " << *this);
+		return;
+	}
+
+	if (cit != beg && cit->type == VIRTUAL) {
+		// It is not possible to separate a virtual element from the
+		// previous one.
+		--cit;
+		wid -= cit->dim.wid;
+	}
+
+	if (cit != beg) {
+		// There is no separator, but several elements (probably
+		// insets) have been added. We can cut at this place.
+		end_ = cit->pos;
+		dim_.wid = wid;
+		elements_.erase(cit, end);
+		return;
+	}
+
+	/* If we are here, it means that we have not found a separator
+	 * to shorten the row. There is one case where we can do
+	 * something: when we have one big string, maybe with some
+	 * other things after it.
+	 */
+	if (cit->breakAt(w - left_margin)) {
+		end_ = cit->endpos;
+		dim_.wid = left_margin + cit->dim.wid;
+		// If there are other elements, they should be removed.
+		elements_.erase(next(cit, 1), end);
+	}
+}
+
+
+void Row::reverseRTL(bool const rtl_par)
+{
+	pos_type i = 0;
+	pos_type const end = elements_.size();
+	while (i < end) {
+		// gather a sequence of elements with the same direction
+		bool const rtl = elements_[i].font.isVisibleRightToLeft();
+		pos_type j = i;
+		while (j < end && elements_[j].font.isVisibleRightToLeft() == rtl)
+			++j;
+		// if the direction is not the same as the paragraph
+		// direction, the sequence has to be reverted.
+		if (rtl != rtl_par)
+			reverse(elements_.begin() + i, elements_.begin() + j);
+		i = j;
+	}
+	// If the paragraph itself is RTL, reverse everything
+	if (rtl_par)
+		reverse(elements_.begin(), elements_.end());
+}
+
 } // namespace lyx