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lyx_mirror/src/TextMetrics.cpp
Dov Feldstern 662b58497e Getting rid of LTR bias --- part 1/? 
This is the first patch in a series meant to remove LTR bias from the code.
Currently, there are many places in the code where "right" and "left" are used,
but where we actually mean "forward" and "backwards" --- which is the same 
thing in LTR text, but not in RTL/Bidi text.

See full details in http://permalink.gmane.org/gmane.editors.lyx.devel/97550.



git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@21128 a592a061-630c-0410-9148-cb99ea01b6c8
2007-10-22 22:18:52 +00:00

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/**
* \file src/TextMetrics.cpp
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author Asger Alstrup
* \author Lars Gullik Bjønnes
* \author Jean-Marc Lasgouttes
* \author John Levon
* \author André Pönitz
* \author Dekel Tsur
* \author Jürgen Vigna
* \author Abdelrazak Younes
*
* Full author contact details are available in file CREDITS.
*/
#include <config.h>
#include "TextMetrics.h"
#include "Bidi.h"
#include "Buffer.h"
#include "buffer_funcs.h"
#include "BufferParams.h"
#include "BufferView.h"
#include "Color.h"
#include "CutAndPaste.h"
#include "debug.h"
#include "FontIterator.h"
#include "FuncRequest.h"
#include "InsetList.h"
#include "Layout.h"
#include "Length.h"
#include "LyXRC.h"
#include "MetricsInfo.h"
#include "paragraph_funcs.h"
#include "ParagraphParameters.h"
#include "ParIterator.h"
#include "rowpainter.h"
#include "Text.h"
#include "VSpace.h"
#include "frontends/FontMetrics.h"
#include "frontends/Painter.h"
#include <boost/current_function.hpp>
using std::make_pair;
using std::max;
using std::min;
using std::endl;
using std::pair;
namespace lyx {
using frontend::FontMetrics;
namespace {
int numberOfSeparators(Paragraph const & par, Row const & row)
{
pos_type const first = max(row.pos(), par.beginOfBody());
pos_type const last = row.endpos() - 1;
int n = 0;
for (pos_type p = first; p < last; ++p) {
if (par.isSeparator(p))
++n;
}
return n;
}
int numberOfLabelHfills(Paragraph const & par, Row const & row)
{
pos_type last = row.endpos() - 1;
pos_type first = row.pos();
// hfill *DO* count at the beginning of paragraphs!
if (first) {
while (first < last && par.isHfill(first))
++first;
}
last = min(last, par.beginOfBody());
int n = 0;
for (pos_type p = first; p < last; ++p) {
if (par.isHfill(p))
++n;
}
return n;
}
int numberOfHfills(Paragraph const & par, Row const & row)
{
pos_type const last = row.endpos();
pos_type first = row.pos();
// hfill *DO* count at the beginning of paragraphs!
if (first) {
while (first < last && par.isHfill(first))
++first;
}
first = max(first, par.beginOfBody());
int n = 0;
for (pos_type p = first; p < last; ++p) {
if (par.isHfill(p))
++n;
}
return n;
}
} // namespace anon
TextMetrics::TextMetrics(BufferView * bv, Text * text)
: bv_(bv), text_(text)
{
BOOST_ASSERT(bv_);
max_width_ = bv_->workWidth();
dim_.wid = max_width_;
dim_.asc = 10;
dim_.des = 10;
//text_->updateLabels(bv->buffer());
}
bool TextMetrics::has(pit_type pit) const
{
return par_metrics_.find(pit) != par_metrics_.end();
}
ParagraphMetrics const & TextMetrics::parMetrics(pit_type pit) const
{
return const_cast<TextMetrics *>(this)->parMetrics(pit, true);
}
pair<pit_type, ParagraphMetrics const *> TextMetrics::first() const
{
ParMetricsCache::const_iterator it = par_metrics_.begin();
return make_pair(it->first, &it->second);
}
pair<pit_type, ParagraphMetrics const *> TextMetrics::last() const
{
ParMetricsCache::const_reverse_iterator it = par_metrics_.rbegin();
return make_pair(it->first, &it->second);
}
ParagraphMetrics & TextMetrics::parMetrics(pit_type pit,
bool redo)
{
ParMetricsCache::iterator pmc_it = par_metrics_.find(pit);
if (pmc_it == par_metrics_.end()) {
pmc_it = par_metrics_.insert(
make_pair(pit, ParagraphMetrics(text_->getPar(pit)))).first;
}
if (pmc_it->second.rows().empty() && redo) {
redoParagraph(pit);
}
return pmc_it->second;
}
int TextMetrics::parPosition(pit_type pit) const
{
if (pit < par_metrics_.begin()->first)
return -1000000;
else if (pit > par_metrics_.rbegin()->first)
return +1000000;
return par_metrics_[pit].position();
}
bool TextMetrics::metrics(MetricsInfo & mi, Dimension & dim, int min_width)
{
BOOST_ASSERT(mi.base.textwidth);
max_width_ = mi.base.textwidth;
// backup old dimension.
Dimension const old_dim = dim_;
// reset dimension.
dim_ = Dimension();
dim_.wid = min_width;
pit_type const npar = text_->paragraphs().size();
if (npar > 1)
// If there is more than one row, expand the text to
// the full allowable width.
dim_.wid = max_width_;
//lyxerr << "TextMetrics::metrics: width: " << mi.base.textwidth
// << " maxWidth: " << max_width_ << "\nfont: " << mi.base.font << endl;
bool changed = false;
unsigned int h = 0;
for (pit_type pit = 0; pit != npar; ++pit) {
changed |= redoParagraph(pit);
ParagraphMetrics const & pm = par_metrics_[pit];
h += pm.height();
if (dim_.wid < pm.width())
dim_.wid = pm.width();
}
dim_.asc = par_metrics_[0].ascent();
dim_.des = h - dim_.asc;
//lyxerr << "dim_.wid " << dim_.wid << endl;
//lyxerr << "dim_.asc " << dim_.asc << endl;
//lyxerr << "dim_.des " << dim_.des << endl;
changed |= dim_ != old_dim;
dim = dim_;
return changed;
}
int TextMetrics::rightMargin(ParagraphMetrics const & pm) const
{
return main_text_? pm.rightMargin(bv_->buffer()) : 0;
}
int TextMetrics::rightMargin(pit_type const pit) const
{
return main_text_? par_metrics_[pit].rightMargin(bv_->buffer()) : 0;
}
void TextMetrics::applyOuterFont(Font & font) const
{
Font lf(font_);
lf.reduce(bv_->buffer().params().getFont());
lf.realize(font);
lf.setLanguage(font.language());
font = lf;
}
Font TextMetrics::getDisplayFont(pit_type pit, pos_type pos) const
{
BOOST_ASSERT(pos >= 0);
ParagraphList const & pars = text_->paragraphs();
Paragraph const & par = pars[pit];
LayoutPtr const & layout = par.layout();
Buffer const & buffer = bv_->buffer();
// FIXME: broken?
BufferParams const & params = buffer.params();
pos_type const body_pos = par.beginOfBody();
// We specialize the 95% common case:
if (!par.getDepth()) {
Font f = par.getFontSettings(params, pos);
if (!text_->isMainText(buffer))
applyOuterFont(f);
bool lab = layout->labeltype == LABEL_MANUAL && pos < body_pos;
Font const & lf = lab ? layout->labelfont : layout->font;
Font rlf = lab ? layout->reslabelfont : layout->resfont;
// In case the default family has been customized
if (lf.family() == Font::INHERIT_FAMILY)
rlf.setFamily(params.getFont().family());
return f.realize(rlf);
}
// The uncommon case need not be optimized as much
Font const & layoutfont = pos < body_pos ?
layout->labelfont : layout->font;
Font font = par.getFontSettings(params, pos);
font.realize(layoutfont);
if (!text_->isMainText(buffer))
applyOuterFont(font);
// Realize against environment font information
// NOTE: the cast to pit_type should be removed when pit_type
// changes to a unsigned integer.
if (pit < pit_type(pars.size()))
font.realize(outerFont(pit, pars));
// Realize with the fonts of lesser depth.
font.realize(params.getFont());
return font;
}
bool TextMetrics::isRTL(CursorSlice const & sl, bool boundary) const
{
if (!lyxrc.rtl_support || !sl.text())
return false;
int correction = 0;
if (boundary && sl.pos() > 0)
correction = -1;
return getDisplayFont(sl.pit(), sl.pos() + correction).isVisibleRightToLeft();
}
bool TextMetrics::isRTLBoundary(pit_type pit, pos_type pos) const
{
if (!lyxrc.rtl_support)
return false;
// no RTL boundary at line start
if (pos == 0)
return false;
Paragraph const & par = text_->getPar(pit);
bool left = getDisplayFont(pit, pos - 1).isVisibleRightToLeft();
bool right;
if (pos == par.size())
right = par.isRTL(bv_->buffer().params());
else
right = getDisplayFont(pit, pos).isVisibleRightToLeft();
return left != right;
}
bool TextMetrics::isRTLBoundary(pit_type pit, pos_type pos,
Font const & font) const
{
if (!lyxrc.rtl_support)
return false;
Paragraph const & par = text_->getPar(pit);
bool left = font.isVisibleRightToLeft();
bool right;
if (pos == par.size())
right = par.isRTL(bv_->buffer().params());
else
right = getDisplayFont(pit, pos).isVisibleRightToLeft();
return left != right;
}
bool TextMetrics::redoParagraph(pit_type const pit)
{
Paragraph & par = text_->getPar(pit);
// IMPORTANT NOTE: We pass 'false' explicitely in order to not call
// redoParagraph() recursively inside parMetrics.
Dimension old_dim = parMetrics(pit, false).dim();
ParagraphMetrics & pm = par_metrics_[pit];
pm.reset(par);
Buffer & buffer = bv_->buffer();
BufferParams const & bparams = buffer.params();
main_text_ = (text_ == &buffer.text());
bool changed = false;
// FIXME This check ought to be done somewhere else. It is the reason
// why text_ is not const. But then, where else to do it?
// Well, how can you end up with either (a) a biblio environment that
// has no InsetBibitem or (b) a biblio environment with more than one
// InsetBibitem? I think the answer is: when paragraphs are merged;
// when layout is set; when material is pasted.
int const moveCursor = par.checkBiblio(buffer.params().trackChanges);
if (moveCursor > 0)
const_cast<Cursor &>(bv_->cursor()).posRight();
else if (moveCursor < 0) {
Cursor & cursor = const_cast<Cursor &>(bv_->cursor());
if (cursor.pos() >= -moveCursor)
cursor.posLeft();
}
// Optimisation: this is used in the next two loops
// so better to calculate that once here.
int const right_margin = rightMargin(pm);
// redo insets
// FIXME: We should always use getFont(), see documentation of
// noFontChange() in Inset.h.
Font const bufferfont = buffer.params().getFont();
InsetList::const_iterator ii = par.insetList().begin();
InsetList::const_iterator iend = par.insetList().end();
for (; ii != iend; ++ii) {
Dimension dim;
int const w = max_width_ - leftMargin(max_width_, pit, ii->pos)
- right_margin;
Font const & font = ii->inset->noFontChange() ?
bufferfont : getDisplayFont(pit, ii->pos);
MetricsInfo mi(bv_, font, w);
ii->inset->metrics(mi, dim);
Dimension const old_dim = pm.insetDimension(ii->inset);
pm.setInsetDimension(ii->inset, dim);
changed |= (old_dim != dim);
}
Cursor const & cur = bv_->cursor();
DocIterator sel_beg = cur.selectionBegin();
DocIterator sel_end = cur.selectionEnd();
bool selection = cur.selection()
// This is out text.
&& cur.text() == text_
// if the anchor is outside, this is not our selection
&& cur.anchor().text() == text_
&& pit >= sel_beg.pit() && pit <= sel_end.pit();
// We care only about visible selection.
if (selection) {
if (pit != sel_beg.pit()) {
sel_beg.pit() = pit;
sel_beg.pos() = 0;
}
if (pit != sel_end.pit()) {
sel_end.pit() = pit;
sel_end.pos() = sel_end.lastpos();
}
}
par.setBeginOfBody();
pos_type first = 0;
size_t row_index = 0;
// maximum pixel width of a row
int width = max_width_ - right_margin; // - leftMargin(max_width_, pit, row);
do {
Dimension dim;
pos_type end = rowBreakPoint(width, pit, first);
if (row_index || end < par.size())
// If there is more than one row, expand the text to
// the full allowable width. This setting here is needed
// for the computeRowMetrics() below.
dim_.wid = max_width_;
dim.wid = rowWidth(right_margin, pit, first, end);
boost::tie(dim.asc, dim.des) = rowHeight(pit, first, end);
if (row_index == pm.rows().size())
pm.rows().push_back(Row());
Row & row = pm.rows()[row_index];
row.setChanged(false);
row.pos(first);
row.endpos(end);
if (selection)
row.setSelection(sel_beg.pos(), sel_end.pos());
else
row.setSelection(-1, -1);
row.setDimension(dim);
int const max_row_width = max(dim_.wid, dim.wid);
computeRowMetrics(pit, row, max_row_width);
pm.computeRowSignature(row, bparams);
first = end;
++row_index;
pm.dim().wid = std::max(pm.dim().wid, dim.wid);
pm.dim().des += dim.height();
} while (first < par.size());
if (row_index < pm.rows().size())
pm.rows().resize(row_index);
// Make sure that if a par ends in newline, there is one more row
// under it
if (first > 0 && par.isNewline(first - 1)) {
Dimension dim;
dim.wid = rowWidth(right_margin, pit, first, first);
boost::tie(dim.asc, dim.des) = rowHeight(pit, first, first);
if (row_index == pm.rows().size())
pm.rows().push_back(Row());
Row & row = pm.rows()[row_index];
row.setChanged(false);
row.pos(first);
row.endpos(first);
row.setDimension(dim);
int const max_row_width = max(dim_.wid, dim.wid);
computeRowMetrics(pit, row, max_row_width);
pm.computeRowSignature(row, bparams);
pm.dim().des += dim.height();
}
pm.dim().asc += pm.rows()[0].ascent();
pm.dim().des -= pm.rows()[0].ascent();
changed |= old_dim.height() != pm.dim().height();
return changed;
}
void TextMetrics::computeRowMetrics(pit_type const pit,
Row & row, int width) const
{
row.label_hfill = 0;
row.hfill = 0;
row.separator = 0;
Buffer & buffer = bv_->buffer();
Paragraph const & par = text_->getPar(pit);
double w = width - row.width();
// FIXME: put back this assertion when the crash on new doc is solved.
//BOOST_ASSERT(w >= 0);
//lyxerr << "\ndim_.wid " << dim_.wid << endl;
//lyxerr << "row.width() " << row.width() << endl;
//lyxerr << "w " << w << endl;
bool const is_rtl = text_->isRTL(buffer, par);
if (is_rtl)
row.x = rightMargin(pit);
else
row.x = leftMargin(max_width_, pit, row.pos());
// is there a manual margin with a manual label
LayoutPtr const & layout = par.layout();
if (layout->margintype == MARGIN_MANUAL
&& layout->labeltype == LABEL_MANUAL) {
/// We might have real hfills in the label part
int nlh = numberOfLabelHfills(par, row);
// A manual label par (e.g. List) has an auto-hfill
// between the label text and the body of the
// paragraph too.
// But we don't want to do this auto hfill if the par
// is empty.
if (!par.empty())
++nlh;
if (nlh && !par.getLabelWidthString().empty())
row.label_hfill = labelFill(pit, row) / double(nlh);
}
// are there any hfills in the row?
int const nh = numberOfHfills(par, row);
if (nh) {
if (w > 0)
row.hfill = w / nh;
// we don't have to look at the alignment if it is ALIGN_LEFT and
// if the row is already larger then the permitted width as then
// we force the LEFT_ALIGN'edness!
} else if (int(row.width()) < max_width_) {
// is it block, flushleft or flushright?
// set x how you need it
int align;
if (par.params().align() == LYX_ALIGN_LAYOUT)
align = layout->align;
else
align = par.params().align();
// Display-style insets should always be on a centred row
// The test on par.size() is to catch zero-size pars, which
// would trigger the assert in Paragraph::getInset().
//inset = par.size() ? par.getInset(row.pos()) : 0;
if (row.pos() < par.size()
&& par.isInset(row.pos()))
{
switch(par.getInset(row.pos())->display()) {
case Inset::AlignLeft:
align = LYX_ALIGN_BLOCK;
break;
case Inset::AlignCenter:
align = LYX_ALIGN_CENTER;
break;
case Inset::Inline:
case Inset::AlignRight:
// unchanged (use align)
break;
}
}
switch (align) {
case LYX_ALIGN_BLOCK: {
int const ns = numberOfSeparators(par, row);
bool disp_inset = false;
if (row.endpos() < par.size()) {
Inset const * in = par.getInset(row.endpos());
if (in)
disp_inset = in->display();
}
// If we have separators, this is not the last row of a
// par, does not end in newline, and is not row above a
// display inset... then stretch it
if (ns
&& row.endpos() < par.size()
&& !par.isNewline(row.endpos() - 1)
&& !disp_inset
) {
row.separator = w / ns;
//lyxerr << "row.separator " << row.separator << endl;
//lyxerr << "ns " << ns << endl;
} else if (is_rtl) {
row.x += w;
}
break;
}
case LYX_ALIGN_RIGHT:
row.x += w;
break;
case LYX_ALIGN_CENTER:
row.x += w / 2;
break;
}
}
if (is_rtl) {
pos_type body_pos = par.beginOfBody();
pos_type end = row.endpos();
if (body_pos > 0
&& (body_pos > end || !par.isLineSeparator(body_pos - 1)))
{
row.x += theFontMetrics(text_->getLabelFont(buffer, par)).
width(layout->labelsep);
if (body_pos <= end)
row.x += row.label_hfill;
}
}
}
int TextMetrics::labelFill(pit_type const pit, Row const & row) const
{
Buffer & buffer = bv_->buffer();
Paragraph const & par = text_->getPar(pit);
pos_type last = par.beginOfBody();
BOOST_ASSERT(last > 0);
// -1 because a label ends with a space that is in the label
--last;
// a separator at this end does not count
if (par.isLineSeparator(last))
--last;
int w = 0;
for (pos_type i = row.pos(); i <= last; ++i)
w += singleWidth(pit, i);
docstring const & label = par.params().labelWidthString();
if (label.empty())
return 0;
FontMetrics const & fm
= theFontMetrics(text_->getLabelFont(buffer, par));
return max(0, fm.width(label) - w);
}
namespace {
// this needs special handling - only newlines count as a break point
pos_type addressBreakPoint(pos_type i, Paragraph const & par)
{
pos_type const end = par.size();
for (; i < end; ++i)
if (par.isNewline(i))
return i + 1;
return end;
}
};
int TextMetrics::labelEnd(pit_type const pit) const
{
// labelEnd is only needed if the layout fills a flushleft label.
if (text_->getPar(pit).layout()->margintype != MARGIN_MANUAL)
return 0;
// return the beginning of the body
return leftMargin(max_width_, pit);
}
pit_type TextMetrics::rowBreakPoint(int width, pit_type const pit,
pit_type pos) const
{
Buffer & buffer = bv_->buffer();
ParagraphMetrics const & pm = par_metrics_[pit];
Paragraph const & par = text_->getPar(pit);
pos_type const end = par.size();
if (pos == end || width < 0)
return end;
LayoutPtr const & layout = par.layout();
if (layout->margintype == MARGIN_RIGHT_ADDRESS_BOX)
return addressBreakPoint(pos, par);
pos_type const body_pos = par.beginOfBody();
// Now we iterate through until we reach the right margin
// or the end of the par, then choose the possible break
// nearest that.
int label_end = labelEnd(pit);
int const left = leftMargin(max_width_, pit, pos);
int x = left;
// pixel width since last breakpoint
int chunkwidth = 0;
FontIterator fi = FontIterator(*this, par, pit, pos);
pos_type point = end;
pos_type i = pos;
for ( ; i < end; ++i, ++fi) {
int thiswidth = pm.singleWidth(i, *fi);
// add the auto-hfill from label end to the body
if (body_pos && i == body_pos) {
FontMetrics const & fm = theFontMetrics(
text_->getLabelFont(buffer, par));
int add = fm.width(layout->labelsep);
if (par.isLineSeparator(i - 1))
add -= singleWidth(pit, i - 1);
add = std::max(add, label_end - x);
thiswidth += add;
}
x += thiswidth;
chunkwidth += thiswidth;
// break before a character that will fall off
// the right of the row
if (x >= width) {
// if no break before, break here
if (point == end || chunkwidth >= width - left) {
if (i > pos)
point = i;
else
point = i + 1;
}
// exit on last registered breakpoint:
break;
}
if (par.isNewline(i)) {
point = i + 1;
break;
}
// Break before...
if (i + 1 < end) {
if (par.isInset(i + 1) && par.getInset(i + 1)->display()) {
point = i + 1;
break;
}
// ...and after.
if (par.isInset(i) && par.getInset(i)->display()) {
point = i + 1;
break;
}
}
if (!par.isInset(i) || par.getInset(i)->isChar()) {
// some insets are line separators too
if (par.isLineSeparator(i)) {
// register breakpoint:
point = i + 1;
chunkwidth = 0;
}
}
}
// maybe found one, but the par is short enough.
if (i == end && x < width)
point = end;
// manual labels cannot be broken in LaTeX. But we
// want to make our on-screen rendering of footnotes
// etc. still break
if (body_pos && point < body_pos)
point = body_pos;
return point;
}
int TextMetrics::rowWidth(int right_margin, pit_type const pit,
pos_type const first, pos_type const end) const
{
Buffer & buffer = bv_->buffer();
// get the pure distance
ParagraphMetrics const & pm = par_metrics_[pit];
Paragraph const & par = text_->getPar(pit);
int w = leftMargin(max_width_, pit, first);
int label_end = labelEnd(pit);
pos_type const body_pos = par.beginOfBody();
pos_type i = first;
if (i < end) {
FontIterator fi = FontIterator(*this, par, pit, i);
for ( ; i < end; ++i, ++fi) {
if (body_pos > 0 && i == body_pos) {
FontMetrics const & fm = theFontMetrics(
text_->getLabelFont(buffer, par));
w += fm.width(par.layout()->labelsep);
if (par.isLineSeparator(i - 1))
w -= singleWidth(pit, i - 1);
w = max(w, label_end);
}
w += pm.singleWidth(i, *fi);
}
}
if (body_pos > 0 && body_pos >= end) {
FontMetrics const & fm = theFontMetrics(
text_->getLabelFont(buffer, par));
w += fm.width(par.layout()->labelsep);
if (end > 0 && par.isLineSeparator(end - 1))
w -= singleWidth(pit, end - 1);
w = max(w, label_end);
}
return w + right_margin;
}
boost::tuple<int, int> TextMetrics::rowHeight(pit_type const pit, pos_type const first,
pos_type const end) const
{
Paragraph const & par = text_->getPar(pit);
// get the maximum ascent and the maximum descent
double layoutasc = 0;
double layoutdesc = 0;
double const dh = defaultRowHeight();
// ok, let us initialize the maxasc and maxdesc value.
// Only the fontsize count. The other properties
// are taken from the layoutfont. Nicer on the screen :)
LayoutPtr const & layout = par.layout();
// as max get the first character of this row then it can
// increase but not decrease the height. Just some point to
// start with so we don't have to do the assignment below too
// often.
Buffer const & buffer = bv_->buffer();
Font font = getDisplayFont(pit, first);
Font::FONT_SIZE const tmpsize = font.size();
font = text_->getLayoutFont(buffer, pit);
Font::FONT_SIZE const size = font.size();
font.setSize(tmpsize);
Font labelfont = text_->getLabelFont(buffer, par);
FontMetrics const & labelfont_metrics = theFontMetrics(labelfont);
FontMetrics const & fontmetrics = theFontMetrics(font);
// these are minimum values
double const spacing_val = layout->spacing.getValue()
* text_->spacing(buffer, par);
//lyxerr << "spacing_val = " << spacing_val << endl;
int maxasc = int(fontmetrics.maxAscent() * spacing_val);
int maxdesc = int(fontmetrics.maxDescent() * spacing_val);
// insets may be taller
ParagraphMetrics const & pm = par_metrics_[pit];
InsetList::const_iterator ii = par.insetList().begin();
InsetList::const_iterator iend = par.insetList().end();
for ( ; ii != iend; ++ii) {
Dimension const & dim = pm.insetDimension(ii->inset);
if (ii->pos >= first && ii->pos < end) {
maxasc = max(maxasc, dim.ascent());
maxdesc = max(maxdesc, dim.descent());
}
}
// Check if any custom fonts are larger (Asger)
// This is not completely correct, but we can live with the small,
// cosmetic error for now.
int labeladdon = 0;
Font::FONT_SIZE maxsize =
par.highestFontInRange(first, end, size);
if (maxsize > font.size()) {
// use standard paragraph font with the maximal size
Font maxfont = font;
maxfont.setSize(maxsize);
FontMetrics const & maxfontmetrics = theFontMetrics(maxfont);
maxasc = max(maxasc, maxfontmetrics.maxAscent());
maxdesc = max(maxdesc, maxfontmetrics.maxDescent());
}
// This is nicer with box insets:
++maxasc;
++maxdesc;
ParagraphList const & pars = text_->paragraphs();
// is it a top line?
if (first == 0) {
BufferParams const & bufparams = buffer.params();
// some parskips VERY EASY IMPLEMENTATION
if (bufparams.paragraph_separation
== BufferParams::PARSEP_SKIP
&& par.ownerCode() != ERT_CODE
&& par.ownerCode() != LISTINGS_CODE
&& pit > 0
&& ((layout->isParagraph() && par.getDepth() == 0)
|| (pars[pit - 1].layout()->isParagraph()
&& pars[pit - 1].getDepth() == 0)))
{
maxasc += bufparams.getDefSkip().inPixels(*bv_);
}
if (par.params().startOfAppendix())
maxasc += int(3 * dh);
// This is special code for the chapter, since the label of this
// layout is printed in an extra row
if (layout->counter == "chapter"
&& !par.params().labelString().empty()) {
labeladdon = int(labelfont_metrics.maxHeight()
* layout->spacing.getValue()
* text_->spacing(buffer, par));
}
// special code for the top label
if ((layout->labeltype == LABEL_TOP_ENVIRONMENT
|| layout->labeltype == LABEL_BIBLIO
|| layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)
&& isFirstInSequence(pit, pars)
&& !par.getLabelstring().empty())
{
labeladdon = int(
labelfont_metrics.maxHeight()
* layout->spacing.getValue()
* text_->spacing(buffer, par)
+ (layout->topsep + layout->labelbottomsep) * dh);
}
// Add the layout spaces, for example before and after
// a section, or between the items of a itemize or enumerate
// environment.
pit_type prev = depthHook(pit, pars, par.getDepth());
Paragraph const & prevpar = pars[prev];
if (prev != pit
&& prevpar.layout() == layout
&& prevpar.getDepth() == par.getDepth()
&& prevpar.getLabelWidthString()
== par.getLabelWidthString()) {
layoutasc = layout->itemsep * dh;
} else if (pit != 0 || first != 0) {
if (layout->topsep > 0)
layoutasc = layout->topsep * dh;
}
prev = outerHook(pit, pars);
if (prev != pit_type(pars.size())) {
maxasc += int(pars[prev].layout()->parsep * dh);
} else if (pit != 0) {
Paragraph const & prevpar = pars[pit - 1];
if (prevpar.getDepth() != 0 ||
prevpar.layout() == layout) {
maxasc += int(layout->parsep * dh);
}
}
}
// is it a bottom line?
if (end >= par.size()) {
// add the layout spaces, for example before and after
// a section, or between the items of a itemize or enumerate
// environment
pit_type nextpit = pit + 1;
if (nextpit != pit_type(pars.size())) {
pit_type cpit = pit;
double usual = 0;
double unusual = 0;
if (pars[cpit].getDepth() > pars[nextpit].getDepth()) {
usual = pars[cpit].layout()->bottomsep * dh;
cpit = depthHook(cpit, pars, pars[nextpit].getDepth());
if (pars[cpit].layout() != pars[nextpit].layout()
|| pars[nextpit].getLabelWidthString() != pars[cpit].getLabelWidthString())
{
unusual = pars[cpit].layout()->bottomsep * dh;
}
layoutdesc = max(unusual, usual);
} else if (pars[cpit].getDepth() == pars[nextpit].getDepth()) {
if (pars[cpit].layout() != pars[nextpit].layout()
|| pars[nextpit].getLabelWidthString() != pars[cpit].getLabelWidthString())
layoutdesc = int(pars[cpit].layout()->bottomsep * dh);
}
}
}
// incalculate the layout spaces
maxasc += int(layoutasc * 2 / (2 + pars[pit].getDepth()));
maxdesc += int(layoutdesc * 2 / (2 + pars[pit].getDepth()));
// FIXME: the correct way is to do the following is to move the
// following code in another method specially tailored for the
// main Text. The following test is thus bogus.
// Top and bottom margin of the document (only at top-level)
if (main_text_) {
if (pit == 0 && first == 0)
maxasc += 20;
if (pit + 1 == pit_type(pars.size()) &&
end == par.size() &&
!(end > 0 && par.isNewline(end - 1)))
maxdesc += 20;
}
return boost::make_tuple(maxasc + labeladdon, maxdesc);
}
// x is an absolute screen coord
// returns the column near the specified x-coordinate of the row
// x is set to the real beginning of this column
pos_type TextMetrics::getColumnNearX(pit_type const pit,
Row const & row, int & x, bool & boundary) const
{
Buffer const & buffer = bv_->buffer();
/// For the main Text, it is possible that this pit is not
/// yet in the CoordCache when moving cursor up.
/// x Paragraph coordinate is always 0 for main text anyway.
int const xo = origin_.x_;
x -= xo;
Paragraph const & par = text_->getPar(pit);
ParagraphMetrics const & pm = par_metrics_[pit];
Bidi bidi;
bidi.computeTables(par, buffer, row);
pos_type vc = row.pos();
pos_type end = row.endpos();
pos_type c = 0;
LayoutPtr const & layout = par.layout();
bool left_side = false;
pos_type body_pos = par.beginOfBody();
double tmpx = row.x;
double last_tmpx = tmpx;
if (body_pos > 0 &&
(body_pos > end || !par.isLineSeparator(body_pos - 1)))
body_pos = 0;
// check for empty row
if (vc == end) {
x = int(tmpx) + xo;
return 0;
}
while (vc < end && tmpx <= x) {
c = bidi.vis2log(vc);
last_tmpx = tmpx;
if (body_pos > 0 && c == body_pos - 1) {
FontMetrics const & fm = theFontMetrics(
text_->getLabelFont(buffer, par));
tmpx += row.label_hfill + fm.width(layout->labelsep);
if (par.isLineSeparator(body_pos - 1))
tmpx -= singleWidth(pit, body_pos - 1);
}
if (pm.hfillExpansion(row, c)) {
tmpx += singleWidth(pit, c);
if (c >= body_pos)
tmpx += row.hfill;
else
tmpx += row.label_hfill;
} else if (par.isSeparator(c)) {
tmpx += singleWidth(pit, c);
if (c >= body_pos)
tmpx += row.separator;
} else {
tmpx += singleWidth(pit, c);
}
++vc;
}
if ((tmpx + last_tmpx) / 2 > x) {
tmpx = last_tmpx;
left_side = true;
}
BOOST_ASSERT(vc <= end); // This shouldn't happen.
boundary = false;
// This (rtl_support test) is not needed, but gives
// some speedup if rtl_support == false
bool const lastrow = lyxrc.rtl_support && row.endpos() == par.size();
// If lastrow is false, we don't need to compute
// the value of rtl.
bool const rtl = lastrow ? text_->isRTL(buffer, par) : false;
if (lastrow &&
((rtl && left_side && vc == row.pos() && x < tmpx - 5) ||
(!rtl && !left_side && vc == end && x > tmpx + 5)))
c = end;
else if (vc == row.pos()) {
c = bidi.vis2log(vc);
if (bidi.level(c) % 2 == 1)
++c;
} else {
c = bidi.vis2log(vc - 1);
bool const rtl = (bidi.level(c) % 2 == 1);
if (left_side == rtl) {
++c;
boundary = isRTLBoundary(pit, c);
}
}
// I believe this code is not needed anymore (Jug 20050717)
#if 0
// The following code is necessary because the cursor position past
// the last char in a row is logically equivalent to that before
// the first char in the next row. That's why insets causing row
// divisions -- Newline and display-style insets -- must be treated
// specially, so cursor up/down doesn't get stuck in an air gap -- MV
// Newline inset, air gap below:
if (row.pos() < end && c >= end && par.isNewline(end - 1)) {
if (bidi.level(end -1) % 2 == 0)
tmpx -= singleWidth(pit, end - 1);
else
tmpx += singleWidth(pit, end - 1);
c = end - 1;
}
// Air gap above display inset:
if (row.pos() < end && c >= end && end < par.size()
&& par.isInset(end) && par.getInset(end)->display()) {
c = end - 1;
}
// Air gap below display inset:
if (row.pos() < end && c >= end && par.isInset(end - 1)
&& par.getInset(end - 1)->display()) {
c = end - 1;
}
#endif
x = int(tmpx) + xo;
pos_type const col = c - row.pos();
if (!c || end == par.size())
return col;
if (c==end && !par.isLineSeparator(c-1) && !par.isNewline(c-1)) {
boundary = true;
return col;
}
return min(col, end - 1 - row.pos());
}
pos_type TextMetrics::x2pos(pit_type pit, int row, int x) const
{
// We play safe and use parMetrics(pit) to make sure the
// ParagraphMetrics will be redone and OK to use if needed.
// Otherwise we would use an empty ParagraphMetrics in
// upDownInText() while in selection mode.
ParagraphMetrics const & pm = parMetrics(pit);
BOOST_ASSERT(row < int(pm.rows().size()));
bool bound = false;
Row const & r = pm.rows()[row];
return r.pos() + getColumnNearX(pit, r, x, bound);
}
void TextMetrics::newParMetricsDown()
{
pair<pit_type, ParagraphMetrics> const & last = *par_metrics_.rbegin();
pit_type const pit = last.first + 1;
if (pit == int(text_->paragraphs().size()))
return;
// do it and update its position.
redoParagraph(pit);
par_metrics_[pit].setPosition(last.second.position()
+ last.second.descent());
}
void TextMetrics::newParMetricsUp()
{
pair<pit_type, ParagraphMetrics> const & first = *par_metrics_.begin();
if (first.first == 0)
return;
pit_type const pit = first.first - 1;
// do it and update its position.
redoParagraph(pit);
par_metrics_[pit].setPosition(first.second.position()
- first.second.ascent());
}
// y is screen coordinate
pit_type TextMetrics::getPitNearY(int y)
{
BOOST_ASSERT(!text_->paragraphs().empty());
LYXERR(Debug::DEBUG)
<< BOOST_CURRENT_FUNCTION
<< ": y: " << y << " cache size: " << par_metrics_.size()
<< endl;
// look for highest numbered paragraph with y coordinate less than given y
pit_type pit = 0;
int yy = -1;
ParMetricsCache::const_iterator it = par_metrics_.begin();
ParMetricsCache::const_iterator et = par_metrics_.end();
ParMetricsCache::const_iterator last = et; last--;
ParagraphMetrics const & pm = it->second;
// If we are off-screen (before the visible part)
if (y < 0
// and even before the first paragraph in the cache.
&& y < it->second.position() - int(pm.ascent())) {
// and we are not at the first paragraph in the inset.
if (it->first == 0)
return 0;
// then this is the paragraph we are looking for.
pit = it->first - 1;
// rebreak it and update the CoordCache.
redoParagraph(pit);
par_metrics_[pit].setPosition(it->second.position() - pm.descent());
return pit;
}
ParagraphMetrics const & pm_last = par_metrics_[last->first];
// If we are off-screen (after the visible part)
if (y > bv_->workHeight()
// and even after the first paragraph in the cache.
&& y >= last->second.position() + int(pm_last.descent())) {
pit = last->first + 1;
// and we are not at the last paragraph in the inset.
if (pit == int(text_->paragraphs().size()))
return last->first;
// then this is the paragraph we are looking for.
// rebreak it and update the CoordCache.
redoParagraph(pit);
par_metrics_[pit].setPosition(last->second.position() + pm_last.ascent());
return pit;
}
for (; it != et; ++it) {
LYXERR(Debug::DEBUG)
<< BOOST_CURRENT_FUNCTION
<< " examining: pit: " << it->first
<< " y: " << it->second.position()
<< endl;
ParagraphMetrics const & pm = par_metrics_[it->first];
if (it->first >= pit && int(it->second.position()) - int(pm.ascent()) <= y) {
pit = it->first;
yy = it->second.position();
}
}
LYXERR(Debug::DEBUG)
<< BOOST_CURRENT_FUNCTION
<< ": found best y: " << yy << " for pit: " << pit
<< endl;
return pit;
}
Row const & TextMetrics::getRowNearY(int y, pit_type pit) const
{
ParagraphMetrics const & pm = par_metrics_[pit];
int yy = pm.position() - pm.ascent();
BOOST_ASSERT(!pm.rows().empty());
RowList::const_iterator rit = pm.rows().begin();
RowList::const_iterator rlast = pm.rows().end();
--rlast;
for (; rit != rlast; yy += rit->height(), ++rit)
if (yy + rit->height() > y)
break;
return *rit;
}
// x,y are absolute screen coordinates
// sets cursor recursively descending into nested editable insets
Inset * TextMetrics::editXY(Cursor & cur, int x, int y)
{
if (lyxerr.debugging(Debug::WORKAREA)) {
lyxerr << "TextMetrics::editXY(cur, " << x << ", " << y << ")" << std::endl;
cur.bv().coordCache().dump();
}
pit_type pit = getPitNearY(y);
BOOST_ASSERT(pit != -1);
Row const & row = getRowNearY(y, pit);
bool bound = false;
int xx = x; // is modified by getColumnNearX
pos_type const pos = row.pos()
+ getColumnNearX(pit, row, xx, bound);
cur.pit() = pit;
cur.pos() = pos;
cur.boundary(bound);
cur.setTargetX(x);
// try to descend into nested insets
Inset * inset = checkInsetHit(x, y);
//lyxerr << "inset " << inset << " hit at x: " << x << " y: " << y << endl;
if (!inset) {
// Either we deconst editXY or better we move current_font
// and real_current_font to Cursor
// FIXME: what is needed now that current_font and real_current_font
// are transferred?
cur.setCurrentFont();
return 0;
}
ParagraphList const & pars = text_->paragraphs();
Inset const * insetBefore = pos? pars[pit].getInset(pos - 1): 0;
//Inset * insetBehind = pars[pit].getInset(pos);
// This should be just before or just behind the
// cursor position set above.
BOOST_ASSERT((pos != 0 && inset == insetBefore)
|| inset == pars[pit].getInset(pos));
// Make sure the cursor points to the position before
// this inset.
if (inset == insetBefore) {
--cur.pos();
cur.boundary(false);
}
// Try to descend recursively inside the inset.
inset = inset->editXY(cur, x, y);
if (cur.top().text() == text_)
cur.setCurrentFont();
return inset;
}
void TextMetrics::setCursorFromCoordinates(Cursor & cur, int const x, int const y)
{
BOOST_ASSERT(text_ == cur.text());
pit_type pit = getPitNearY(y);
ParagraphMetrics const & pm = par_metrics_[pit];
int yy = pm.position() - pm.ascent();
LYXERR(Debug::DEBUG)
<< BOOST_CURRENT_FUNCTION
<< ": x: " << x
<< " y: " << y
<< " pit: " << pit
<< " yy: " << yy << endl;
int r = 0;
BOOST_ASSERT(pm.rows().size());
for (; r < int(pm.rows().size()) - 1; ++r) {
Row const & row = pm.rows()[r];
if (int(yy + row.height()) > y)
break;
yy += row.height();
}
Row const & row = pm.rows()[r];
LYXERR(Debug::DEBUG)
<< BOOST_CURRENT_FUNCTION
<< ": row " << r
<< " from pos: " << row.pos()
<< endl;
bool bound = false;
int xx = x;
pos_type const pos = row.pos() + getColumnNearX(pit, row, xx, bound);
LYXERR(Debug::DEBUG)
<< BOOST_CURRENT_FUNCTION
<< ": setting cursor pit: " << pit
<< " pos: " << pos
<< endl;
text_->setCursor(cur, pit, pos, true, bound);
// remember new position.
cur.setTargetX();
}
//takes screen x,y coordinates
Inset * TextMetrics::checkInsetHit(int x, int y)
{
pit_type pit = getPitNearY(y);
BOOST_ASSERT(pit != -1);
Paragraph const & par = text_->paragraphs()[pit];
ParagraphMetrics const & pm = par_metrics_[pit];
LYXERR(Debug::DEBUG)
<< BOOST_CURRENT_FUNCTION
<< ": x: " << x
<< " y: " << y
<< " pit: " << pit
<< endl;
InsetList::const_iterator iit = par.insetList().begin();
InsetList::const_iterator iend = par.insetList().end();
for (; iit != iend; ++iit) {
Inset * inset = iit->inset;
LYXERR(Debug::DEBUG)
<< BOOST_CURRENT_FUNCTION
<< ": examining inset " << inset << endl;
if (!bv_->coordCache().getInsets().has(inset)) {
LYXERR(Debug::DEBUG)
<< BOOST_CURRENT_FUNCTION
<< ": inset has no cached position" << endl;
return 0;
}
Dimension const & dim = pm.insetDimension(inset);
Point p = bv_->coordCache().getInsets().xy(inset);
LYXERR(Debug::DEBUG)
<< BOOST_CURRENT_FUNCTION
<< ": xo: " << p.x_ << "..." << p.x_ + dim.wid
<< " yo: " << p.y_ - dim.asc << "..." << p.y_ + dim.des
<< endl;
if (x >= p.x_
&& x <= p.x_ + dim.wid
&& y >= p.y_ - dim.asc
&& y <= p.y_ + dim.des) {
LYXERR(Debug::DEBUG)
<< BOOST_CURRENT_FUNCTION
<< ": Hit inset: " << inset << endl;
return inset;
}
}
LYXERR(Debug::DEBUG)
<< BOOST_CURRENT_FUNCTION
<< ": No inset hit. " << endl;
return 0;
}
int TextMetrics::cursorX(CursorSlice const & sl,
bool boundary) const
{
BOOST_ASSERT(sl.text() == text_);
pit_type const pit = sl.pit();
Paragraph const & par = text_->paragraphs()[pit];
ParagraphMetrics const & pm = par_metrics_[pit];
if (pm.rows().empty())
return 0;
pos_type ppos = sl.pos();
// Correct position in front of big insets
bool const boundary_correction = ppos != 0 && boundary;
if (boundary_correction)
--ppos;
Row const & row = pm.getRow(sl.pos(), boundary);
pos_type cursor_vpos = 0;
Buffer const & buffer = bv_->buffer();
double x = row.x;
Bidi bidi;
bidi.computeTables(par, buffer, row);
pos_type const row_pos = row.pos();
pos_type const end = row.endpos();
// Spaces at logical line breaks in bidi text must be skipped during
// cursor positioning. However, they may appear visually in the middle
// of a row; they must be skipped, wherever they are...
// * logically "abc_[HEBREW_\nHEBREW]"
// * visually "abc_[_WERBEH\nWERBEH]"
pos_type skipped_sep_vpos = -1;
if (end <= row_pos)
cursor_vpos = row_pos;
else if (ppos >= end)
cursor_vpos = text_->isRTL(buffer, par) ? row_pos : end;
else if (ppos > row_pos && ppos >= end)
// Place cursor after char at (logical) position pos - 1
cursor_vpos = (bidi.level(ppos - 1) % 2 == 0)
? bidi.log2vis(ppos - 1) + 1 : bidi.log2vis(ppos - 1);
else
// Place cursor before char at (logical) position ppos
cursor_vpos = (bidi.level(ppos) % 2 == 0)
? bidi.log2vis(ppos) : bidi.log2vis(ppos) + 1;
pos_type body_pos = par.beginOfBody();
if (body_pos > 0 &&
(body_pos > end || !par.isLineSeparator(body_pos - 1)))
body_pos = 0;
// Use font span to speed things up, see below
FontSpan font_span;
Font font;
// If the last logical character is a separator, skip it, unless
// it's in the last row of a paragraph; see skipped_sep_vpos declaration
if (end > 0 && end < par.size() && par.isSeparator(end - 1))
skipped_sep_vpos = bidi.log2vis(end - 1);
for (pos_type vpos = row_pos; vpos < cursor_vpos; ++vpos) {
// Skip the separator which is at the logical end of the row
if (vpos == skipped_sep_vpos)
continue;
pos_type pos = bidi.vis2log(vpos);
if (body_pos > 0 && pos == body_pos - 1) {
FontMetrics const & labelfm = theFontMetrics(
text_->getLabelFont(buffer, par));
x += row.label_hfill + labelfm.width(par.layout()->labelsep);
if (par.isLineSeparator(body_pos - 1))
x -= singleWidth(pit, body_pos - 1);
}
// Use font span to speed things up, see above
if (pos < font_span.first || pos > font_span.last) {
font_span = par.fontSpan(pos);
font = getDisplayFont(pit, pos);
}
x += pm.singleWidth(pos, font);
if (pm.hfillExpansion(row, pos))
x += (pos >= body_pos) ? row.hfill : row.label_hfill;
else if (par.isSeparator(pos) && pos >= body_pos)
x += row.separator;
}
// see correction above
if (boundary_correction) {
if (isRTL(sl, boundary))
x -= singleWidth(pit, ppos);
else
x += singleWidth(pit, ppos);
}
return int(x);
}
int TextMetrics::cursorY(CursorSlice const & sl, bool boundary) const
{
//lyxerr << "TextMetrics::cursorY: boundary: " << boundary << std::endl;
ParagraphMetrics const & pm = par_metrics_[sl.pit()];
if (pm.rows().empty())
return 0;
int h = 0;
h -= par_metrics_[0].rows()[0].ascent();
for (pit_type pit = 0; pit < sl.pit(); ++pit) {
h += par_metrics_[pit].height();
}
int pos = sl.pos();
if (pos && boundary)
--pos;
size_t const rend = pm.pos2row(pos);
for (size_t rit = 0; rit != rend; ++rit)
h += pm.rows()[rit].height();
h += pm.rows()[rend].ascent();
return h;
}
void TextMetrics::cursorPrevious(Cursor & cur)
{
pos_type cpos = cur.pos();
pit_type cpar = cur.pit();
int x = cur.x_target();
setCursorFromCoordinates(cur, x, 0);
cur.dispatch(FuncRequest(cur.selection()? LFUN_UP_SELECT: LFUN_UP));
if (cpar == cur.pit() && cpos == cur.pos())
// we have a row which is taller than the workarea. The
// simplest solution is to move to the previous row instead.
cur.dispatch(FuncRequest(cur.selection()? LFUN_UP_SELECT: LFUN_UP));
cur.finishUndo();
cur.updateFlags(Update::Force | Update::FitCursor);
}
void TextMetrics::cursorNext(Cursor & cur)
{
pos_type cpos = cur.pos();
pit_type cpar = cur.pit();
int x = cur.x_target();
setCursorFromCoordinates(cur, x, cur.bv().workHeight() - 1);
cur.dispatch(FuncRequest(cur.selection()? LFUN_DOWN_SELECT: LFUN_DOWN));
if (cpar == cur.pit() && cpos == cur.pos())
// we have a row which is taller than the workarea. The
// simplest solution is to move to the next row instead.
cur.dispatch(
FuncRequest(cur.selection()? LFUN_DOWN_SELECT: LFUN_DOWN));
cur.finishUndo();
cur.updateFlags(Update::Force | Update::FitCursor);
}
// the cursor set functions have a special mechanism. When they
// realize you left an empty paragraph, they will delete it.
bool TextMetrics::cursorHome(Cursor & cur)
{
BOOST_ASSERT(text_ == cur.text());
ParagraphMetrics const & pm = par_metrics_[cur.pit()];
Row const & row = pm.getRow(cur.pos(),cur.boundary());
return text_->setCursor(cur, cur.pit(), row.pos());
}
bool TextMetrics::cursorEnd(Cursor & cur)
{
BOOST_ASSERT(text_ == cur.text());
// if not on the last row of the par, put the cursor before
// the final space exept if I have a spanning inset or one string
// is so long that we force a break.
pos_type end = cur.textRow().endpos();
if (end == 0)
// empty text, end-1 is no valid position
return false;
bool boundary = false;
if (end != cur.lastpos()) {
if (!cur.paragraph().isLineSeparator(end-1)
&& !cur.paragraph().isNewline(end-1))
boundary = true;
else
--end;
}
return text_->setCursor(cur, cur.pit(), end, true, boundary);
}
void TextMetrics::deleteLineForward(Cursor & cur)
{
BOOST_ASSERT(text_ == cur.text());
if (cur.lastpos() == 0) {
// Paragraph is empty, so we just go forward
text_->cursorForward(cur);
} else {
cur.resetAnchor();
cur.selection() = true; // to avoid deletion
cursorEnd(cur);
cur.setSelection();
// What is this test for ??? (JMarc)
if (!cur.selection())
text_->deleteWordForward(cur);
else
cap::cutSelection(cur, true, false);
checkBufferStructure(cur.buffer(), cur);
}
}
bool TextMetrics::isLastRow(pit_type pit, Row const & row) const
{
ParagraphList const & pars = text_->paragraphs();
return row.endpos() >= pars[pit].size()
&& pit + 1 == pit_type(pars.size());
}
bool TextMetrics::isFirstRow(pit_type pit, Row const & row) const
{
return row.pos() == 0 && pit == 0;
}
int TextMetrics::leftMargin(int max_width, pit_type pit) const
{
BOOST_ASSERT(pit >= 0);
BOOST_ASSERT(pit < int(text_->paragraphs().size()));
return leftMargin(max_width, pit, text_->paragraphs()[pit].size());
}
int TextMetrics::leftMargin(int max_width,
pit_type const pit, pos_type const pos) const
{
ParagraphList const & pars = text_->paragraphs();
BOOST_ASSERT(pit >= 0);
BOOST_ASSERT(pit < int(pars.size()));
Paragraph const & par = pars[pit];
BOOST_ASSERT(pos >= 0);
BOOST_ASSERT(pos <= par.size());
Buffer const & buffer = bv_->buffer();
//lyxerr << "TextMetrics::leftMargin: pit: " << pit << " pos: " << pos << endl;
TextClass const & tclass = buffer.params().getTextClass();
LayoutPtr const & layout = par.layout();
docstring parindent = layout->parindent;
int l_margin = 0;
if (text_->isMainText(buffer))
l_margin += changebarMargin();
l_margin += theFontMetrics(buffer.params().getFont()).signedWidth(
tclass.leftmargin());
if (par.getDepth() != 0) {
// find the next level paragraph
pit_type newpar = outerHook(pit, pars);
if (newpar != pit_type(pars.size())) {
if (pars[newpar].layout()->isEnvironment()) {
l_margin = leftMargin(max_width, newpar);
}
if (par.layout() == tclass.defaultLayout()) {
if (pars[newpar].params().noindent())
parindent.erase();
else
parindent = pars[newpar].layout()->parindent;
}
}
}
// This happens after sections in standard classes. The 1.3.x
// code compared depths too, but it does not seem necessary
// (JMarc)
if (par.layout() == tclass.defaultLayout()
&& pit > 0 && pars[pit - 1].layout()->nextnoindent)
parindent.erase();
Font const labelfont = text_->getLabelFont(buffer, par);
FontMetrics const & labelfont_metrics = theFontMetrics(labelfont);
switch (layout->margintype) {
case MARGIN_DYNAMIC:
if (!layout->leftmargin.empty()) {
l_margin += theFontMetrics(buffer.params().getFont()).signedWidth(
layout->leftmargin);
}
if (!par.getLabelstring().empty()) {
l_margin += labelfont_metrics.signedWidth(layout->labelindent);
l_margin += labelfont_metrics.width(par.getLabelstring());
l_margin += labelfont_metrics.width(layout->labelsep);
}
break;
case MARGIN_MANUAL: {
l_margin += labelfont_metrics.signedWidth(layout->labelindent);
// The width of an empty par, even with manual label, should be 0
if (!par.empty() && pos >= par.beginOfBody()) {
if (!par.getLabelWidthString().empty()) {
docstring labstr = par.getLabelWidthString();
l_margin += labelfont_metrics.width(labstr);
l_margin += labelfont_metrics.width(layout->labelsep);
}
}
break;
}
case MARGIN_STATIC: {
l_margin += theFontMetrics(buffer.params().getFont()).
signedWidth(layout->leftmargin) * 4 / (par.getDepth() + 4);
break;
}
case MARGIN_FIRST_DYNAMIC:
if (layout->labeltype == LABEL_MANUAL) {
if (pos >= par.beginOfBody()) {
l_margin += labelfont_metrics.signedWidth(layout->leftmargin);
} else {
l_margin += labelfont_metrics.signedWidth(layout->labelindent);
}
} else if (pos != 0
// Special case to fix problems with
// theorems (JMarc)
|| (layout->labeltype == LABEL_STATIC
&& layout->latextype == LATEX_ENVIRONMENT
&& !isFirstInSequence(pit, pars))) {
l_margin += labelfont_metrics.signedWidth(layout->leftmargin);
} else if (layout->labeltype != LABEL_TOP_ENVIRONMENT
&& layout->labeltype != LABEL_BIBLIO
&& layout->labeltype !=
LABEL_CENTERED_TOP_ENVIRONMENT) {
l_margin += labelfont_metrics.signedWidth(layout->labelindent);
l_margin += labelfont_metrics.width(layout->labelsep);
l_margin += labelfont_metrics.width(par.getLabelstring());
}
break;
case MARGIN_RIGHT_ADDRESS_BOX: {
#if 0
// ok, a terrible hack. The left margin depends on the widest
// row in this paragraph.
RowList::iterator rit = par.rows().begin();
RowList::iterator end = par.rows().end();
// FIXME: This is wrong.
int minfill = max_width;
for ( ; rit != end; ++rit)
if (rit->fill() < minfill)
minfill = rit->fill();
l_margin += theFontMetrics(params.getFont()).signedWidth(layout->leftmargin);
l_margin += minfill;
#endif
// also wrong, but much shorter.
l_margin += max_width / 2;
break;
}
}
if (!par.params().leftIndent().zero())
l_margin += par.params().leftIndent().inPixels(max_width);
LyXAlignment align;
if (par.params().align() == LYX_ALIGN_LAYOUT)
align = layout->align;
else
align = par.params().align();
// set the correct parindent
if (pos == 0
&& (layout->labeltype == LABEL_NO_LABEL
|| layout->labeltype == LABEL_TOP_ENVIRONMENT
|| layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT
|| (layout->labeltype == LABEL_STATIC
&& layout->latextype == LATEX_ENVIRONMENT
&& !isFirstInSequence(pit, pars)))
&& align == LYX_ALIGN_BLOCK
&& !par.params().noindent()
// in some insets, paragraphs are never indented
&& !(par.inInset() && par.inInset()->neverIndent(buffer))
// display style insets are always centered, omit indentation
&& !(!par.empty()
&& par.isInset(pos)
&& par.getInset(pos)->display())
&& (par.layout() != tclass.defaultLayout()
|| buffer.params().paragraph_separation ==
BufferParams::PARSEP_INDENT))
{
l_margin += theFontMetrics(buffer.params().getFont()).signedWidth(
parindent);
}
return l_margin;
}
int TextMetrics::singleWidth(pit_type pit, pos_type pos) const
{
ParagraphMetrics const & pm = par_metrics_[pit];
return pm.singleWidth(pos, getDisplayFont(pit, pos));
}
// only used for inset right now. should also be used for main text
void TextMetrics::draw(PainterInfo & pi, int x, int y) const
{
if (par_metrics_.empty())
return;
origin_.x_ = x;
origin_.y_ = y;
ParMetricsCache::iterator it = par_metrics_.begin();
ParMetricsCache::iterator const pm_end = par_metrics_.end();
y -= it->second.ascent();
for (; it != pm_end; ++it) {
ParagraphMetrics const & pmi = it->second;
y += pmi.ascent();
pit_type const pit = it->first;
// Save the paragraph position in the cache.
it->second.setPosition(y);
drawParagraph(pi, pit, x, y);
y += pmi.descent();
}
}
void TextMetrics::drawParagraph(PainterInfo & pi, pit_type pit, int x, int y) const
{
// lyxerr << " paintPar: pit: " << pit << " at y: " << y << endl;
int const ww = bv_->workHeight();
ParagraphMetrics const & pm = par_metrics_[pit];
if (pm.rows().empty())
return;
RowList::const_iterator const rb = pm.rows().begin();
RowList::const_iterator const re = pm.rows().end();
Bidi bidi;
y -= rb->ascent();
for (RowList::const_iterator rit = rb; rit != re; ++rit) {
y += rit->ascent();
bool const inside = (y + rit->descent() >= 0
&& y - rit->ascent() < ww);
// it is not needed to draw on screen if we are not inside.
pi.pain.setDrawingEnabled(inside);
RowPainter rp(pi, *text_, pit, *rit, bidi, x, y);
// Row signature; has row changed since last paint?
bool row_has_changed = rit->changed();
bool row_selection = rit->sel_beg != -1 && rit->sel_end != -1;
if (!row_selection && !pi.full_repaint && !row_has_changed) {
// Paint the only the insets if the text itself is
// unchanged.
rp.paintOnlyInsets();
y += rit->descent();
continue;
}
// Paint the row if a full repaint has been requested or it has
// changed.
// Clear background of this row
// (if paragraph background was not cleared)
if (row_selection || (!pi.full_repaint && row_has_changed)) {
pi.pain.fillRectangle(x, y - rit->ascent(),
width(), rit->height(),
Color_color(Color::color(pi.background_color)));
}
if (row_selection) {
DocIterator beg = bv_->cursor().selectionBegin();
DocIterator end = bv_->cursor().selectionEnd();
beg.pit() = pit;
beg.pos() = rit->sel_beg;
if (pit == end.pit()) {
end.pos() = rit->sel_end;
} else {
end.pit() = pit + 1;
end.pos() = 0;
}
drawSelection(pi, beg, end, x);
}
// Instrumentation for testing row cache (see also
// 12 lines lower):
if (lyxerr.debugging(Debug::PAINTING)) {
if (text_->isMainText(bv_->buffer()))
LYXERR(Debug::PAINTING) << "\n{" << inside <<
pi.full_repaint << row_has_changed << "}";
else
LYXERR(Debug::PAINTING) << "[" << inside <<
pi.full_repaint << row_has_changed << "]";
}
// Backup full_repaint status and force full repaint
// for inner insets as the Row has been cleared out.
bool tmp = pi.full_repaint;
pi.full_repaint = true;
rp.paintAppendix();
rp.paintDepthBar();
rp.paintChangeBar();
if (rit == rb)
rp.paintFirst();
rp.paintText();
if (rit + 1 == re)
rp.paintLast();
y += rit->descent();
// Restore full_repaint status.
pi.full_repaint = tmp;
}
// Re-enable screen drawing for future use of the painter.
pi.pain.setDrawingEnabled(true);
//LYXERR(Debug::PAINTING) << "." << endl;
}
// FIXME: only take care of one row!
void TextMetrics::drawSelection(PainterInfo & pi,
DocIterator const & beg, DocIterator const & end, int x) const
{
ParagraphMetrics const & pm1 = parMetrics(beg.pit());
ParagraphMetrics const & pm2 = parMetrics(end.pit());
Row const & row1 = pm1.getRow(beg.pos(), beg.boundary());
Row const & row2 = pm2.getRow(end.pos(), end.boundary());
// clip above
int middleTop;
bool const clipAbove = (bv_->cursorStatus(beg) == CUR_ABOVE);
if (clipAbove)
middleTop = 0;
else
middleTop = bv_->getPos(beg, beg.boundary()).y_ + row1.descent();
// clip below
int middleBottom;
bool const clipBelow = (bv_->cursorStatus(end) == CUR_BELOW);
if (clipBelow)
middleBottom = bv_->workHeight();
else
middleBottom = bv_->getPos(end, end.boundary()).y_ - row2.ascent();
// start and end in the same line?
if (!clipAbove && !clipBelow && &row1 == &row2)
// then only draw this row's selection
drawRowSelection(pi, x, row1, beg, end, false, false);
else {
if (!clipAbove) {
// get row end
DocIterator begRowEnd = beg;
begRowEnd.pos() = row1.endpos();
begRowEnd.boundary(true);
// draw upper rectangle
drawRowSelection(pi, x, row1, beg, begRowEnd, false, true);
}
if (middleTop < middleBottom) {
// draw middle rectangle
pi.pain.fillRectangle(x, middleTop, width(), middleBottom - middleTop,
Color::selection);
}
if (!clipBelow) {
// get row begin
DocIterator endRowBeg = end;
endRowBeg.pos() = row2.pos();
endRowBeg.boundary(false);
// draw low rectangle
drawRowSelection(pi, x, row2, endRowBeg, end, true, false);
}
}
}
void TextMetrics::drawRowSelection(PainterInfo & pi, int x, Row const & row,
DocIterator const & beg, DocIterator const & end,
bool drawOnBegMargin, bool drawOnEndMargin) const
{
Buffer & buffer = bv_->buffer();
DocIterator cur = beg;
int x1 = cursorX(beg.top(), beg.boundary());
int x2 = cursorX(end.top(), end.boundary());
int y1 = bv_->getPos(cur, cur.boundary()).y_ - row.ascent();
int y2 = y1 + row.height();
// draw the margins
if (drawOnBegMargin) {
if (text_->isRTL(buffer, beg.paragraph()))
pi.pain.fillRectangle(x + x1, y1, width() - x1, y2 - y1, Color::selection);
else
pi.pain.fillRectangle(x, y1, x1, y2 - y1, Color::selection);
}
if (drawOnEndMargin) {
if (text_->isRTL(buffer, beg.paragraph()))
pi.pain.fillRectangle(x, y1, x2, y2 - y1, Color::selection);
else
pi.pain.fillRectangle(x + x2, y1, width() - x2, y2 - y1, Color::selection);
}
// if we are on a boundary from the beginning, it's probably
// a RTL boundary and we jump to the other side directly as this
// segement is 0-size and confuses the logic below
if (cur.boundary())
cur.boundary(false);
// go through row and draw from RTL boundary to RTL boundary
while (cur < end) {
bool drawNow = false;
// simplified cursorForward code below which does not
// descend into insets and which does not go into the
// next line. Compare the logic with the original cursorForward
// if left of boundary -> just jump to right side
// but for RTL boundaries don't, because: abc|DDEEFFghi -> abcDDEEF|Fghi
if (cur.boundary()) {
cur.boundary(false);
} else if (isRTLBoundary(cur.pit(), cur.pos() + 1)) {
// in front of RTL boundary -> Stay on this side of the boundary because:
// ab|cDDEEFFghi -> abc|DDEEFFghi
++cur.pos();
cur.boundary(true);
drawNow = true;
} else {
// move right
++cur.pos();
// line end?
if (cur.pos() == row.endpos())
cur.boundary(true);
}
if (x1 == -1) {
// the previous segment was just drawn, now the next starts
x1 = cursorX(cur.top(), cur.boundary());
}
if (!(cur < end) || drawNow) {
x2 = cursorX(cur.top(), cur.boundary());
pi.pain.fillRectangle(x + min(x1,x2), y1, abs(x2 - x1), y2 - y1,
Color::selection);
// reset x1, so it is set again next round (which will be on the
// right side of a boundary or at the selection end)
x1 = -1;
}
}
}
//int TextMetrics::pos2x(pit_type pit, pos_type pos) const
//{
// ParagraphMetrics const & pm = par_metrics_[pit];
// Row const & r = pm.rows()[row];
// int x = 0;
// pos -= r.pos();
//}
int defaultRowHeight()
{
return int(theFontMetrics(Font(Font::ALL_SANE)).maxHeight() * 1.2);
}
} // namespace lyx
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