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lyx_mirror/src/TextMetrics.cpp
Jean-Marc Lasgouttes 57c3a94730 Add RtL information to Row 
This allows to somewhat simplify the text and avoid some uses of
Paragraph (in the long term, RowPainter should not have to access
these things).

At the same time do a small cleanup to RowPainter: rename
text_metrics_ to tm_, remove pm_ and width_.
2017-02-02 14:53:01 +01:00

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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 "Buffer.h"
#include "buffer_funcs.h"
#include "BufferParams.h"
#include "BufferView.h"
#include "CoordCache.h"
#include "Cursor.h"
#include "CutAndPaste.h"
#include "HSpace.h"
#include "InsetList.h"
#include "Language.h"
#include "Layout.h"
#include "LyXRC.h"
#include "MetricsInfo.h"
#include "ParagraphParameters.h"
#include "RowPainter.h"
#include "Text.h"
#include "TextClass.h"
#include "VSpace.h"
#include "insets/InsetText.h"
#include "mathed/MathMacroTemplate.h"
#include "frontends/FontMetrics.h"
#include "frontends/Painter.h"
#include "support/debug.h"
#include "support/lassert.h"
#include <stdlib.h>
#include <cmath>
using namespace std;
namespace lyx {
using frontend::FontMetrics;
namespace {
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;
}
// FIXME: this needs to be rewritten, probably by merging it into some
// code that, besides counting, sets the active status of the space
// inset in the row element.
int numberOfHfills(Row const & row, ParagraphMetrics const & pm,
pos_type const body_pos)
{
int n = 0;
Row::const_iterator cit = row.begin();
Row::const_iterator const end = row.end();
for ( ; cit != end ; ++cit)
if (cit->pos >= body_pos
&& cit->inset && pm.hfillExpansion(row, cit->pos))
++n;
return n;
}
}
/////////////////////////////////////////////////////////////////////
//
// TextMetrics
//
/////////////////////////////////////////////////////////////////////
TextMetrics::TextMetrics(BufferView * bv, Text * text)
: bv_(bv), text_(text)
{
LBUFERR(bv_);
max_width_ = bv_->workWidth();
dim_.wid = max_width_;
dim_.asc = 10;
dim_.des = 10;
}
bool TextMetrics::contains(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
{
LBUFERR(!par_metrics_.empty());
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;
}
bool TextMetrics::metrics(MetricsInfo & mi, Dimension & dim, int min_width)
{
LBUFERR(mi.base.textwidth > 0);
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 text_->isMainText() ? pm.rightMargin(*bv_) : 0;
}
int TextMetrics::rightMargin(pit_type const pit) const
{
return text_->isMainText() ? par_metrics_[pit].rightMargin(*bv_) : 0;
}
void TextMetrics::applyOuterFont(Font & font) const
{
FontInfo lf(font_.fontInfo());
lf.reduce(bv_->buffer().params().getFont().fontInfo());
font.fontInfo().realize(lf);
}
Font TextMetrics::displayFont(pit_type pit, pos_type pos) const
{
LASSERT(pos >= 0, { static Font f; return f; });
ParagraphList const & pars = text_->paragraphs();
Paragraph const & par = pars[pit];
Layout 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())
applyOuterFont(f);
bool lab = layout.labeltype == LABEL_MANUAL && pos < body_pos;
FontInfo const & lf = lab ? layout.labelfont : layout.font;
FontInfo rlf = lab ? layout.reslabelfont : layout.resfont;
// In case the default family has been customized
if (lf.family() == INHERIT_FAMILY)
rlf.setFamily(params.getFont().fontInfo().family());
f.fontInfo().realize(rlf);
return f;
}
// The uncommon case need not be optimized as much
FontInfo const & layoutfont = pos < body_pos ?
layout.labelfont : layout.font;
Font font = par.getFontSettings(params, pos);
font.fontInfo().realize(layoutfont);
if (!text_->isMainText())
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.fontInfo().realize(text_->outerFont(pit).fontInfo());
// Realize with the fonts of lesser depth.
font.fontInfo().realize(params.getFont().fontInfo());
return font;
}
bool TextMetrics::isRTL(CursorSlice const & sl, bool boundary) const
{
if (!sl.text())
return false;
int correction = 0;
if (boundary && sl.pos() > 0)
correction = -1;
return displayFont(sl.pit(), sl.pos() + correction).isVisibleRightToLeft();
}
bool TextMetrics::isRTLBoundary(pit_type pit, pos_type pos) const
{
// no RTL boundary at paragraph start
if (pos == 0)
return false;
Font const & left_font = displayFont(pit, pos - 1);
return isRTLBoundary(pit, pos, left_font);
}
// isRTLBoundary returns false on a real end-of-line boundary,
// because otherwise the two boundary types get mixed up.
// This is the whole purpose of this being in TextMetrics.
bool TextMetrics::isRTLBoundary(pit_type pit, pos_type pos,
Font const & font) const
{
if (// no RTL boundary at paragraph start
pos == 0
// if the metrics have not been calculated, then we are not
// on screen and can safely ignore issues about boundaries.
|| !contains(pit))
return false;
ParagraphMetrics & pm = par_metrics_[pit];
// no RTL boundary in empty paragraph
if (pm.rows().empty())
return false;
pos_type endpos = pm.getRow(pos - 1, false).endpos();
pos_type startpos = pm.getRow(pos, false).pos();
// no RTL boundary at line start:
// abc\n -> toggle to RTL -> abc\n (and not: abc\n|
// | | )
if (pos == startpos && pos == endpos) // start of cur row, end of prev row
return false;
Paragraph const & par = text_->getPar(pit);
// no RTL boundary at line break:
// abc|\n -> move right -> abc\n (and not: abc\n|
// FED FED| FED )
if (startpos == pos && endpos == pos && endpos != par.size()
&& (par.isNewline(pos - 1)
|| par.isEnvSeparator(pos - 1)
|| par.isLineSeparator(pos - 1)
|| par.isSeparator(pos - 1)))
return false;
bool left = font.isVisibleRightToLeft();
bool right;
if (pos == par.size())
right = par.isRTL(bv_->buffer().params());
else
right = displayFont(pit, pos).isVisibleRightToLeft();
return left != right;
}
bool TextMetrics::redoParagraph(pit_type const pit)
{
Paragraph & par = text_->getPar(pit);
// IMPORTANT NOTE: We pass 'false' explicitly 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();
bool changed = false;
// Check whether there are InsetBibItems that need fixing
// 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.
if (par.brokenBiblio()) {
Cursor & cur = const_cast<Cursor &>(bv_->cursor());
// In some cases, we do not know how to record undo
if (&cur.inset() == &text_->inset())
cur.recordUndo(pit, pit);
int const moveCursor = par.fixBiblio(buffer);
// Is it necessary to update the cursor?
if (&cur.inset() == &text_->inset() && cur.pit() == pit) {
if (moveCursor > 0)
cur.posForward();
else if (moveCursor < 0 && cur.pos() >= -moveCursor)
cur.posBackward();
}
}
// Optimisation: this is used in the next two loops
// so better to calculate that once here.
int const right_margin = rightMargin(pm);
// iterator pointing to paragraph to resolve macros
DocIterator parPos = text_->macrocontextPosition();
if (!parPos.empty())
parPos.pit() = pit;
else {
LYXERR(Debug::INFO, "MacroContext not initialised!"
<< " Going through the buffer again and hope"
<< " the context is better then.");
// FIXME audit updateBuffer calls
// This should not be here, but it is not clear yet where else it
// should be.
bv_->buffer().updateBuffer();
parPos = text_->macrocontextPosition();
LBUFERR(!parPos.empty());
parPos.pit() = pit;
}
// redo insets
par.setBeginOfBody();
Font const bufferfont = buffer.params().getFont();
CoordCache::Insets & insetCache = bv_->coordCache().insets();
InsetList::const_iterator ii = par.insetList().begin();
InsetList::const_iterator iend = par.insetList().end();
for (; ii != iend; ++ii) {
// FIXME Doesn't this HAVE to be non-empty?
// position already initialized?
if (!parPos.empty()) {
parPos.pos() = ii->pos;
// A macro template would normally not be visible
// by itself. But the tex macro semantics allow
// recursion, so we artifically take the context
// after the macro template to simulate this.
if (ii->inset->lyxCode() == MATHMACRO_CODE)
parPos.pos()++;
}
// do the metric calculation
Dimension dim;
int const w = max_width_ - leftMargin(max_width_, pit, ii->pos)
- right_margin;
Font const & font = ii->inset->inheritFont() ?
displayFont(pit, ii->pos) : bufferfont;
MacroContext mc(&buffer, parPos);
MetricsInfo mi(bv_, font.fontInfo(), w, mc);
ii->inset->metrics(mi, dim);
if (!insetCache.has(ii->inset) || insetCache.dim(ii->inset) != dim) {
insetCache.add(ii->inset, dim);
changed = true;
}
}
pos_type first = 0;
size_t row_index = 0;
bool need_new_row = false;
// maximum pixel width of a row
do {
if (row_index == pm.rows().size())
pm.rows().push_back(Row());
Row & row = pm.rows()[row_index];
row.pit(pit);
row.pos(first);
row.pit(pit);
need_new_row = breakRow(row, right_margin);
setRowHeight(row);
row.setChanged(false);
if (row_index || row.endpos() < par.size()
|| (row.right_boundary() && par.inInset().lyxCode() != CELL_CODE)) {
/* If there is more than one row or the row has been
* broken by a display inset or a newline, expand the text
* to the full allowable width. This setting here is
* needed for the computeRowMetrics() below. In the case
* of a display inset, we do nothing when inside a table
* cell, because the tabular code is not prepared for
* that, and it triggers when using a caption in a
* longtable (see bugs #9945 and #9757).
*/
if (dim_.wid < max_width_)
dim_.wid = max_width_;
}
int const max_row_width = max(dim_.wid, row.width());
computeRowMetrics(row, max_row_width);
first = row.endpos();
++row_index;
pm.dim().wid = max(pm.dim().wid, row.width());
pm.dim().des += row.height();
} while (first < par.size() || need_new_row);
if (row_index < pm.rows().size())
pm.rows().resize(row_index);
// FIXME: It might be better to move this in another method
// specially tailored for the main text.
// Top and bottom margin of the document (only at top-level)
if (text_->isMainText()) {
if (pit == 0) {
pm.rows().front().dimension().asc += 20;
/* coverity[copy_paste_error]: coverity thinks that we
* should update pm.dim().asc below, but all the rows
* heights are actually counted as part of the paragraph metric
* descent see loop above).
*/
pm.dim().des += 20;
}
ParagraphList const & pars = text_->paragraphs();
if (pit + 1 == pit_type(pars.size())) {
pm.rows().back().dimension().des += 20;
pm.dim().des += 20;
}
}
// The space above and below the paragraph.
int const top = parTopSpacing(pit);
pm.rows().front().dimension().asc += top;
int const bottom = parBottomSpacing(pit);
pm.rows().back().dimension().des += bottom;
pm.dim().des += top + bottom;
pm.dim().asc += pm.rows()[0].ascent();
pm.dim().des -= pm.rows()[0].ascent();
changed |= old_dim.height() != pm.dim().height();
return changed;
}
LyXAlignment TextMetrics::getAlign(Paragraph const & par, Row const & row) const
{
LyXAlignment align = par.getAlign();
// handle alignment inside tabular cells
Inset const & owner = text_->inset();
bool forced_block = false;
switch (owner.contentAlignment()) {
case LYX_ALIGN_BLOCK:
// In general block align is the default state, but here it is
// an explicit choice. Therefore it should not be overridden
// later.
forced_block = true;
// fall through
case LYX_ALIGN_CENTER:
case LYX_ALIGN_LEFT:
case LYX_ALIGN_RIGHT:
if (align == LYX_ALIGN_NONE || align == LYX_ALIGN_BLOCK)
align = owner.contentAlignment();
break;
default:
// unchanged (use align)
break;
}
// Display-style insets should always be on a centered row
if (Inset const * inset = par.getInset(row.pos())) {
switch (inset->display()) {
case Inset::AlignLeft:
align = LYX_ALIGN_BLOCK;
break;
case Inset::AlignCenter:
align = LYX_ALIGN_CENTER;
break;
case Inset::Inline:
// unchanged (use align)
break;
case Inset::AlignRight:
align = LYX_ALIGN_RIGHT;
break;
}
}
if (align == LYX_ALIGN_BLOCK) {
// If this row has been broken abruptly by a display inset, or
// it is the end of the paragraph, or the user requested we
// not justify stuff, then don't stretch.
// A forced block alignment can only be overridden the 'no
// justification on screen' setting.
if ((row.flushed() && !forced_block)
|| !bv_->buffer().params().justification)
align = row.isRTL() ? LYX_ALIGN_RIGHT : LYX_ALIGN_LEFT;
}
return align;
}
void TextMetrics::computeRowMetrics(Row & row, int width) const
{
row.label_hfill = 0;
row.separator = 0;
Paragraph const & par = text_->getPar(row.pit());
int const w = width - row.right_margin - row.width();
// FIXME: put back this assertion when the crash on new doc is solved.
//LASSERT(w >= 0, /**/);
// is there a manual margin with a manual label
Layout const & layout = par.layout();
int nlh = 0;
if (layout.margintype == MARGIN_MANUAL
&& layout.labeltype == LABEL_MANUAL) {
/// We might have real hfills in the label part
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(row) / double(nlh);
}
// are there any hfills in the row?
ParagraphMetrics & pm = par_metrics_[row.pit()];
int nh = numberOfHfills(row, pm, par.beginOfBody());
int hfill = 0;
int hfill_rem = 0;
// We don't have to look at the alignment if the row is already
// larger then the permitted width as then we force the
// LEFT_ALIGN'edness!
if (int(row.width()) >= max_width_)
return;
if (nh == 0) {
// Common case : there is no hfill, and the alignment will be
// meaningful
switch (getAlign(par, row)) {
case LYX_ALIGN_BLOCK:
// Expand expanding characters by a total of w
if (!row.setExtraWidth(w) && row.isRTL()) {
// Justification failed and the text is RTL: align to the right
row.left_margin += w;
row.dimension().wid += w;
}
break;
case LYX_ALIGN_RIGHT:
row.left_margin += w;
row.dimension().wid += w;
break;
case LYX_ALIGN_CENTER:
row.dimension().wid += w / 2;
row.left_margin += w / 2;
break;
case LYX_ALIGN_LEFT:
case LYX_ALIGN_NONE:
case LYX_ALIGN_LAYOUT:
case LYX_ALIGN_SPECIAL:
case LYX_ALIGN_DECIMAL:
break;
}
return;
}
// Case nh > 0. There are hfill separators.
hfill = w / nh;
hfill_rem = w % nh;
row.dimension().wid += w;
// Set size of hfill insets
pos_type const endpos = row.endpos();
pos_type body_pos = par.beginOfBody();
if (body_pos > 0
&& (body_pos > endpos || !par.isLineSeparator(body_pos - 1)))
body_pos = 0;
CoordCache::Insets & insetCache = bv_->coordCache().insets();
Row::iterator cit = row.begin();
Row::iterator const cend = row.end();
for ( ; cit != cend; ++cit) {
if (row.label_hfill && cit->endpos == body_pos
&& cit->type == Row::SPACE)
cit->dim.wid -= int(row.label_hfill * (nlh - 1));
if (cit->inset && pm.hfillExpansion(row, cit->pos)) {
if (cit->pos >= body_pos) {
cit->dim.wid += hfill;
--nh;
if (nh == 0)
cit->dim.wid += hfill_rem;
} else
cit->dim.wid += int(row.label_hfill);
// Cache the inset dimension.
insetCache.add(cit->inset, cit->dim);
}
}
}
int TextMetrics::labelFill(Row const & row) const
{
Paragraph const & par = text_->getPar(row.pit());
LBUFERR(par.beginOfBody() > 0 || par.isEnvSeparator(0));
int w = 0;
Row::const_iterator cit = row.begin();
Row::const_iterator const end = row.end();
// iterate over elements before main body (except the last one,
// which is extra space).
while (cit!= end && cit->endpos < par.beginOfBody()) {
w += cit->dim.wid;
++cit;
}
docstring const & label = par.params().labelWidthString();
if (label.empty())
return 0;
FontMetrics const & fm
= theFontMetrics(text_->labelFont(par));
return max(0, fm.width(label) - w);
}
#if 0
// Not used, see TextMetrics::breakRow
// this needs special handling - only newlines count as a break point
static 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;
}
#endif
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);
}
namespace {
/**
* Calling Text::getFont is slow. While rebreaking we scan a
* paragraph from left to right calling getFont for every char. This
* simple class address this problem by hidding an optimization trick
* (not mine btw -AB): the font is reused in the whole font span. The
* class handles transparently the "hidden" (not part of the fontlist)
* label font (as getFont does).
**/
class FontIterator
{
public:
///
FontIterator(TextMetrics const & tm,
Paragraph const & par, pit_type pit, pos_type pos)
: tm_(tm), par_(par), pit_(pit), pos_(pos),
font_(tm.displayFont(pit, pos)),
endspan_(par.fontSpan(pos).last),
bodypos_(par.beginOfBody())
{}
///
Font const & operator*() const { return font_; }
///
FontIterator & operator++()
{
++pos_;
if (pos_ < par_.size() && (pos_ > endspan_ || pos_ == bodypos_)) {
font_ = tm_.displayFont(pit_, pos_);
endspan_ = par_.fontSpan(pos_).last;
}
return *this;
}
///
Font * operator->() { return &font_; }
private:
///
TextMetrics const & tm_;
///
Paragraph const & par_;
///
pit_type pit_;
///
pos_type pos_;
///
Font font_;
///
pos_type endspan_;
///
pos_type bodypos_;
};
} // anon namespace
/** This is the function where the hard work is done. The code here is
* very sensitive to small changes :) Note that part of the
* intelligence is also in Row::shortenIfNeeded.
*/
bool TextMetrics::breakRow(Row & row, int const right_margin) const
{
Paragraph const & par = text_->getPar(row.pit());
pos_type const end = par.size();
pos_type const pos = row.pos();
pos_type const body_pos = par.beginOfBody();
bool const is_rtl = text_->isRTL(par);
bool need_new_row = false;
row.clear();
row.left_margin = leftMargin(max_width_, row.pit(), pos);
row.right_margin = right_margin;
if (is_rtl)
swap(row.left_margin, row.right_margin);
// Remember that the row width takes into account the left_margin
// but not the right_margin.
row.dimension().wid = row.left_margin;
// the width available for the row.
int const width = max_width_ - row.right_margin;
if (pos >= end || row.width() > width) {
row.endpos(end);
return need_new_row;
}
#if 0
//FIXME: As long as leftMargin() is not correctly implemented for
// MARGIN_RIGHT_ADDRESS_BOX, we should also not do this here.
// Otherwise, long rows will be painted off the screen.
if (par.layout().margintype == MARGIN_RIGHT_ADDRESS_BOX)
return addressBreakPoint(pos, par);
#endif
// check for possible inline completion
DocIterator const & ic_it = bv_->inlineCompletionPos();
pos_type ic_pos = -1;
if (ic_it.inTexted() && ic_it.text() == text_ && ic_it.pit() == row.pit())
ic_pos = ic_it.pos();
// Now we iterate through until we reach the right margin
// or the end of the par, then build a representation of the row.
pos_type i = pos;
FontIterator fi = FontIterator(*this, par, row.pit(), pos);
do {
// this can happen for an empty row after a newline
if (i >= end)
break;
char_type c = par.getChar(i);
// The most special cases are handled first.
if (par.isInset(i)) {
Inset const * ins = par.getInset(i);
Dimension dim = bv_->coordCache().insets().dim(ins);
row.add(i, ins, dim, *fi, par.lookupChange(i));
} else if (c == ' ' && i + 1 == body_pos) {
// There is a space at i, but it should not be
// added as a separator, because it is just
// before body_pos. Instead, insert some spacing to
// align text
FontMetrics const & fm = theFontMetrics(text_->labelFont(par));
// this is needed to make sure that the row width is correct
row.finalizeLast();
int const add = max(fm.width(par.layout().labelsep),
labelEnd(row.pit()) - row.width());
row.addSpace(i, add, *fi, par.lookupChange(i));
} else if (c == '\t')
row.addSpace(i, theFontMetrics(*fi).width(from_ascii(" ")),
*fi, par.lookupChange(i));
else if (c == 0x2028 || c == 0x2029) {
/**
* U+2028 LINE SEPARATOR
* U+2029 PARAGRAPH SEPARATOR
* These are special unicode characters that break
* lines/pragraphs. Not handling them lead to trouble wrt
* Qt QTextLayout formatting. We add a visible character
* on screen so that the user can see that something is
* happening.
*/
row.finalizeLast();
// ⤶ U+2936 ARROW POINTING DOWNWARDS THEN CURVING LEFTWARDS
// ¶ U+00B6 PILCROW SIGN
char_type const screen_char = (c == 0x2028) ? 0x2936 : 0x00B6;
row.add(i, screen_char, *fi, par.lookupChange(i));
} else {
// FIXME: please someone fix the Hebrew/Arabic parenthesis mess!
// see also Paragraph::getUChar.
if (fi->language()->lang() == "hebrew") {
if (c == '(')
c = ')';
else if (c == ')')
c = '(';
}
row.add(i, c, *fi, par.lookupChange(i));
}
// add inline completion width
// draw logically behind the previous character
if (ic_pos == i + 1 && !bv_->inlineCompletion().empty()) {
docstring const comp = bv_->inlineCompletion();
size_t const uniqueTo =bv_->inlineCompletionUniqueChars();
Font f = *fi;
if (uniqueTo > 0) {
f.fontInfo().setColor(Color_inlinecompletion);
row.addVirtual(i + 1, comp.substr(0, uniqueTo), f, Change());
}
f.fontInfo().setColor(Color_nonunique_inlinecompletion);
row.addVirtual(i + 1, comp.substr(uniqueTo), f, Change());
}
// Handle some situations that abruptly terminate the row
// - A newline inset
// - Before a display inset
// - After a display inset
Inset const * inset = 0;
if (par.isNewline(i) || par.isEnvSeparator(i)
|| (i + 1 < end && (inset = par.getInset(i + 1))
&& inset->display())
|| (!row.empty() && row.back().inset
&& row.back().inset->display())) {
row.flushed(true);
need_new_row = par.isNewline(i);
++i;
break;
}
++i;
++fi;
} while (i < end && row.width() <= width);
row.finalizeLast();
row.endpos(i);
// End of paragraph marker
ParagraphList const & pars = text_->paragraphs();
if (lyxrc.paragraph_markers && !need_new_row
&& i == end && size_type(row.pit() + 1) < pars.size()) {
// add a virtual element for the end-of-paragraph
// marker; it is shown on screen, but does not exist
// in the paragraph.
Font f(text_->layoutFont(row.pit()));
f.fontInfo().setColor(Color_paragraphmarker);
BufferParams const & bparams
= text_->inset().buffer().params();
f.setLanguage(par.getParLanguage(bparams));
// ¶ U+00B6 PILCROW SIGN
row.addVirtual(end, docstring(1, char_type(0x00B6)), f, Change());
}
// if the row is too large, try to cut at last separator. In case
// of success, reset indication that the row was broken abruptly.
int const next_width = max_width_ - leftMargin(max_width_, row.pit(), row.endpos())
- rightMargin(row.pit());
row.shortenIfNeeded(body_pos, width, next_width);
row.right_boundary(!row.empty() && row.endpos() < end
&& row.back().endpos == row.endpos());
// Last row in paragraph is flushed
if (row.endpos() == end)
row.flushed(true);
// make sure that the RTL elements are in reverse ordering
row.reverseRTL(is_rtl);
//LYXERR0("breakrow: row is " << row);
return need_new_row;
}
int TextMetrics::parTopSpacing(pit_type const pit) const
{
Paragraph const & par = text_->getPar(pit);
Layout const & layout = par.layout();
int asc = 0;
ParagraphList const & pars = text_->paragraphs();
double const dh = defaultRowHeight();
BufferParams const & bparams = bv_->buffer().params();
Inset const & inset = text_->inset();
// some parskips VERY EASY IMPLEMENTATION
if (bparams.paragraph_separation == BufferParams::ParagraphSkipSeparation
&& !inset.getLayout().parbreakIsNewline()
&& !par.layout().parbreak_is_newline
&& pit > 0
&& ((layout.isParagraph() && par.getDepth() == 0)
|| (pars[pit - 1].layout().isParagraph()
&& pars[pit - 1].getDepth() == 0))) {
asc += bparams.getDefSkip().inPixels(*bv_);
}
if (par.params().startOfAppendix())
asc += int(3 * dh);
// special code for the top label
if (layout.labelIsAbove()
&& (!layout.isParagraphGroup() || text_->isFirstInSequence(pit))
&& !par.labelString().empty()) {
FontInfo labelfont = text_->labelFont(par);
FontMetrics const & lfm = theFontMetrics(labelfont);
asc += int(lfm.maxHeight() * layout.spacing.getValue()
* text_->spacing(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 = text_->depthHook(pit, par.getDepth());
Paragraph const & prevpar = pars[prev];
double layoutasc = 0;
if (prev != pit
&& prevpar.layout() == layout
&& prevpar.getDepth() == par.getDepth()
&& prevpar.getLabelWidthString() == par.getLabelWidthString()) {
layoutasc = layout.itemsep * dh;
} else if (pit != 0 && layout.topsep > 0)
layoutasc = layout.topsep * dh;
asc += int(layoutasc * 2 / (2 + pars[pit].getDepth()));
prev = text_->outerHook(pit);
if (prev != pit_type(pars.size())) {
asc += int(pars[prev].layout().parsep * dh);
} else if (pit != 0) {
Paragraph const & prevpar = pars[pit - 1];
if (prevpar.getDepth() != 0 || prevpar.layout() == layout)
asc += int(layout.parsep * dh);
}
return asc;
}
int TextMetrics::parBottomSpacing(pit_type const pit) const
{
double layoutdesc = 0;
ParagraphList const & pars = text_->paragraphs();
double const dh = defaultRowHeight();
// 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;
if (pars[cpit].getDepth() > pars[nextpit].getDepth()) {
double usual = pars[cpit].layout().bottomsep * dh;
double unusual = 0;
cpit = text_->depthHook(cpit, 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);
}
}
return int(layoutdesc * 2 / (2 + pars[pit].getDepth()));
}
void TextMetrics::setRowHeight(Row & row) const
{
Paragraph const & par = text_->getPar(row.pit());
Layout const & layout = par.layout();
double const spacing_val = layout.spacing.getValue() * text_->spacing(par);
// Initial value for ascent (useful if row is empty).
Font const font = displayFont(row.pit(), row.pos());
FontMetrics const & fm = theFontMetrics(font);
int maxasc = int(fm.maxAscent() * spacing_val);
int maxdes = int(fm.maxDescent() * spacing_val);
// Find the ascent/descent of the row contents
Row::const_iterator cit = row.begin();
Row::const_iterator cend = row.end();
for ( ; cit != cend; ++cit) {
if (cit->inset) {
maxasc = max(maxasc, cit->dim.ascent());
maxdes = max(maxdes, cit->dim.descent());
} else {
FontMetrics const & fm = theFontMetrics(cit->font);
maxasc = max(maxasc, int(fm.maxAscent() * spacing_val));
maxdes = max(maxdes, int(fm.maxDescent() * spacing_val));
}
}
// This is nicer with box insets
++maxasc;
++maxdes;
row.dimension().asc = maxasc;
row.dimension().des = maxdes;
}
// 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::getPosNearX(Row const & row, int & x,
bool & boundary) const
{
//LYXERR0("getPosNearX(" << x << ") row=" << row);
/// 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;
// Adapt to cursor row scroll offset if applicable.
int const offset = bv_->horizScrollOffset(text_, row.pit(), row.pos());
x += offset;
pos_type pos = row.pos();
boundary = false;
if (row.empty())
x = row.left_margin;
else if (x <= row.left_margin) {
pos = row.front().left_pos();
x = row.left_margin;
} else if (x >= row.width()) {
pos = row.back().right_pos();
x = row.width();
} else {
double w = row.left_margin;
Row::const_iterator cit = row.begin();
Row::const_iterator cend = row.end();
for ( ; cit != cend; ++cit) {
if (w <= x && w + cit->full_width() > x) {
int x_offset = int(x - w);
pos = cit->x2pos(x_offset);
x = int(x_offset + w);
break;
}
w += cit->full_width();
}
if (cit == row.end()) {
pos = row.back().right_pos();
x = row.width();
}
/** This tests for the case where the cursor is placed
* just before a font direction change. See comment on
* the boundary_ member in DocIterator.h to understand
* how boundary helps here.
*/
else if (pos == cit->endpos
&& cit + 1 != row.end()
&& cit->isRTL() != (cit + 1)->isRTL())
boundary = true;
}
/** This tests for the case where the cursor is set at the end
* of a row which has been broken due something else than a
* separator (a display inset or a forced breaking of the
* row). We know that there is a separator when the end of the
* row is larger than the end of its last element.
*/
if (!row.empty() && pos == row.back().endpos
&& row.back().endpos == row.endpos()) {
Inset const * inset = row.back().inset;
if (inset && (inset->lyxCode() == NEWLINE_CODE
|| inset->lyxCode() == SEPARATOR_CODE))
pos = row.back().pos;
else
boundary = row.right_boundary();
}
x += xo - offset;
//LYXERR0("getPosNearX ==> pos=" << pos << ", boundary=" << boundary);
return 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);
LBUFERR(row < int(pm.rows().size()));
bool bound = false;
Row const & r = pm.rows()[row];
return getPosNearX(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() + par_metrics_[pit].ascent());
}
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() - par_metrics_[pit].descent());
}
// y is screen coordinate
pit_type TextMetrics::getPitNearY(int y)
{
LASSERT(!text_->paragraphs().empty(), return -1);
LASSERT(!par_metrics_.empty(), return -1);
LYXERR(Debug::DEBUG, "y: " << y << " cache size: " << par_metrics_.size());
// look for highest numbered paragraph with y coordinate less than given y
pit_type pit = -1;
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 (y < it->second.position() - int(pm.ascent())) {
// We are looking for a position that is before the first paragraph in
// the cache (which is in priciple off-screen, that is before the
// visible part.
if (it->first == 0)
// We are already at the first paragraph in the inset.
return 0;
// OK, this is the paragraph we are looking for.
pit = it->first - 1;
newParMetricsUp();
return pit;
}
ParagraphMetrics const & pm_last = par_metrics_[last->first];
if (y >= last->second.position() + int(pm_last.descent())) {
// We are looking for a position that is after the last paragraph in
// the cache (which is in priciple off-screen), that is before the
// visible part.
pit = last->first + 1;
if (pit == int(text_->paragraphs().size()))
// We are already at the last paragraph in the inset.
return last->first;
// OK, this is the paragraph we are looking for.
newParMetricsDown();
return pit;
}
for (; it != et; ++it) {
LYXERR(Debug::DEBUG, "examining: pit: " << it->first
<< " y: " << it->second.position());
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, "found best y: " << yy << " for pit: " << pit);
return pit;
}
Row const & TextMetrics::getPitAndRowNearY(int & y, pit_type & pit,
bool assert_in_view, bool up)
{
ParagraphMetrics const & pm = par_metrics_[pit];
int yy = pm.position() - pm.ascent();
LBUFERR(!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;
if (assert_in_view) {
if (!up && yy + rit->height() > y) {
if (rit != pm.rows().begin()) {
y = yy;
--rit;
} else if (pit != 0) {
--pit;
newParMetricsUp();
ParagraphMetrics const & pm2 = par_metrics_[pit];
rit = pm2.rows().end();
--rit;
y = yy;
}
} else if (up && yy != y) {
if (rit != rlast) {
y = yy + rit->height();
++rit;
} else if (pit < int(text_->paragraphs().size()) - 1) {
++pit;
newParMetricsDown();
ParagraphMetrics const & pm2 = par_metrics_[pit];
rit = pm2.rows().begin();
y = pm2.position();
}
}
}
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,
bool assert_in_view, bool up)
{
if (lyxerr.debugging(Debug::WORKAREA)) {
LYXERR0("TextMetrics::editXY(cur, " << x << ", " << y << ")");
cur.bv().coordCache().dump();
}
pit_type pit = getPitNearY(y);
LASSERT(pit != -1, return 0);
int yy = y; // is modified by getPitAndRowNearY
Row const & row = getPitAndRowNearY(yy, pit, assert_in_view, up);
cur.pit() = pit;
// Do we cover an inset?
InsetList::InsetTable * it = checkInsetHit(pit, x, yy);
if (!it) {
// No inset, set position in the text
bool bound = false; // is modified by getPosNearX
int xx = x; // is modified by getPosNearX
cur.pos() = getPosNearX(row, xx, bound);
cur.boundary(bound);
cur.setCurrentFont();
cur.setTargetX(xx);
return 0;
}
Inset * inset = it->inset;
//lyxerr << "inset " << inset << " hit at x: " << x << " y: " << y << endl;
// Set position in front of inset
cur.pos() = it->pos;
cur.boundary(false);
cur.setTargetX(x);
// Try to descend recursively inside the inset.
Inset * edited = inset->editXY(cur, x, yy);
if (edited == inset && cur.pos() == it->pos) {
// non-editable inset, set cursor after the inset if x is
// nearer to that position (bug 9628)
CoordCache::Insets const & insetCache = bv_->coordCache().getInsets();
Dimension const & dim = insetCache.dim(inset);
Point p = insetCache.xy(inset);
bool const is_rtl = text_->isRTL(text_->getPar(pit));
if (is_rtl) {
// "in front of" == "right of"
if (abs(p.x_ - x) < abs(p.x_ + dim.wid - x))
cur.posForward();
} else {
// "in front of" == "left of"
if (abs(p.x_ + dim.wid - x) < abs(p.x_ - x))
cur.posForward();
}
}
if (cur.top().text() == text_)
cur.setCurrentFont();
return edited;
}
void TextMetrics::setCursorFromCoordinates(Cursor & cur, int const x, int const y)
{
LASSERT(text_ == cur.text(), return);
pit_type const pit = getPitNearY(y);
LASSERT(pit != -1, return);
ParagraphMetrics const & pm = par_metrics_[pit];
int yy = pm.position() - pm.ascent();
LYXERR(Debug::DEBUG, "x: " << x << " y: " << y <<
" pit: " << pit << " yy: " << yy);
int r = 0;
LBUFERR(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, "row " << r << " from pos: " << row.pos());
bool bound = false;
int xx = x;
pos_type const pos = getPosNearX(row, xx, bound);
LYXERR(Debug::DEBUG, "setting cursor pit: " << pit << " pos: " << pos);
text_->setCursor(cur, pit, pos, true, bound);
// remember new position.
cur.setTargetX();
}
//takes screen x,y coordinates
InsetList::InsetTable * TextMetrics::checkInsetHit(pit_type pit, int x, int y)
{
Paragraph const & par = text_->paragraphs()[pit];
CoordCache::Insets const & insetCache = bv_->coordCache().getInsets();
LYXERR(Debug::DEBUG, "x: " << x << " y: " << y << " pit: " << pit);
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, "examining inset " << inset);
if (!insetCache.has(inset)) {
LYXERR(Debug::DEBUG, "inset has no cached position");
return 0;
}
Dimension const & dim = insetCache.dim(inset);
Point p = insetCache.xy(inset);
LYXERR(Debug::DEBUG, "xo: " << p.x_ << "..." << p.x_ + dim.wid
<< " yo: " << p.y_ - dim.asc << "..." << p.y_ + dim.des);
if (x >= p.x_ && x <= p.x_ + dim.wid
&& y >= p.y_ - dim.asc && y <= p.y_ + dim.des) {
LYXERR(Debug::DEBUG, "Hit inset: " << inset);
return const_cast<InsetList::InsetTable *>(&(*iit));
}
}
LYXERR(Debug::DEBUG, "No inset hit. ");
return 0;
}
//takes screen x,y coordinates
Inset * TextMetrics::checkInsetHit(int x, int y)
{
pit_type const pit = getPitNearY(y);
LASSERT(pit != -1, return 0);
InsetList::InsetTable * it = checkInsetHit(pit, x, y);
if (!it)
return 0;
return it->inset;
}
Row::const_iterator const
TextMetrics::findRowElement(Row const & row, pos_type const pos,
bool const boundary, double & x) const
{
/**
* When boundary is true, position i is in the row element (pos, endpos)
* if
* pos < i <= endpos
* whereas, when boundary is false, the test is
* pos <= i < endpos
* The correction below allows to handle both cases.
*/
int const boundary_corr = (boundary && pos) ? -1 : 0;
x = row.left_margin;
/** Early return in trivial cases
* 1) the row is empty
* 2) the position is the left-most position of the row; there
* is a quirk here however: if the first element is virtual
* (end-of-par marker for example), then we have to look
* closer
*/
if (row.empty()
|| (pos == row.begin()->left_pos() && !boundary
&& !row.begin()->isVirtual()))
return row.begin();
Row::const_iterator cit = row.begin();
for ( ; cit != row.end() ; ++cit) {
/** Look whether the cursor is inside the element's
* span. Note that it is necessary to take the
* boundary into account, and to accept virtual
* elements, which have pos == endpos.
*/
if (pos + boundary_corr >= cit->pos
&& (pos + boundary_corr < cit->endpos || cit->isVirtual())) {
x += cit->pos2x(pos);
break;
}
x += cit->full_width();
}
if (cit == row.end())
--cit;
return cit;
}
int TextMetrics::cursorX(CursorSlice const & sl,
bool boundary) const
{
LASSERT(sl.text() == text_, return 0);
ParagraphMetrics const & pm = par_metrics_[sl.pit()];
if (pm.rows().empty())
return 0;
Row const & row = pm.getRow(sl.pos(), boundary);
pos_type const pos = sl.pos();
double x = 0;
findRowElement(row, pos, boundary, x);
return int(x);
}
int TextMetrics::cursorY(CursorSlice const & sl, bool boundary) const
{
//lyxerr << "TextMetrics::cursorY: boundary: " << boundary << 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;
}
// 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)
{
LASSERT(text_ == cur.text(), return false);
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)
{
LASSERT(text_ == cur.text(), return false);
// 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)
&& !cur.paragraph().isEnvSeparator(end-1))
boundary = true;
else
--end;
} else if (cur.paragraph().isEnvSeparator(end-1))
--end;
return text_->setCursor(cur, cur.pit(), end, true, boundary);
}
void TextMetrics::deleteLineForward(Cursor & cur)
{
LASSERT(text_ == cur.text(), return);
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);
cur.checkBufferStructure();
}
}
bool TextMetrics::isLastRow(Row const & row) const
{
ParagraphList const & pars = text_->paragraphs();
return row.endpos() >= pars[row.pit()].size()
&& row.pit() + 1 == pit_type(pars.size());
}
bool TextMetrics::isFirstRow(Row const & row) const
{
return row.pos() == 0 && row.pit() == 0;
}
int TextMetrics::leftMargin(int max_width, pit_type pit) const
{
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();
LASSERT(pit >= 0, return 0);
LASSERT(pit < int(pars.size()), return 0);
Paragraph const & par = pars[pit];
LASSERT(pos >= 0, return 0);
LASSERT(pos <= par.size(), return 0);
Buffer const & buffer = bv_->buffer();
//lyxerr << "TextMetrics::leftMargin: pit: " << pit << " pos: " << pos << endl;
DocumentClass const & tclass = buffer.params().documentClass();
Layout const & layout = par.layout();
FontMetrics const & bfm = theFontMetrics(buffer.params().getFont());
docstring parindent = layout.parindent;
int l_margin = 0;
if (text_->isMainText())
l_margin += bv_->leftMargin();
l_margin += bfm.signedWidth(tclass.leftmargin());
int depth = par.getDepth();
if (depth != 0) {
// find the next level paragraph
pit_type newpar = text_->outerHook(pit);
if (newpar != pit_type(pars.size())) {
if (pars[newpar].layout().isEnvironment()) {
int nestmargin = depth * nestMargin();
if (text_->isMainText())
nestmargin += changebarMargin();
l_margin = max(leftMargin(max_width, newpar), nestmargin);
// Remove the parindent that has been added
// if the paragraph was empty.
if (pars[newpar].empty() &&
buffer.params().paragraph_separation ==
BufferParams::ParagraphIndentSeparation) {
docstring pi = pars[newpar].layout().parindent;
l_margin -= bfm.signedWidth(pi);
}
}
if (tclass.isDefaultLayout(par.layout())
|| tclass.isPlainLayout(par.layout())) {
if (pars[newpar].params().noindent())
parindent.erase();
else
parindent = pars[newpar].layout().parindent;
}
}
}
// This happens after sections or environments in standard classes.
// We have to check the previous layout at same depth.
if (buffer.params().paragraph_separation ==
BufferParams::ParagraphSkipSeparation)
parindent.erase();
else if (pit > 0 && pars[pit - 1].getDepth() >= par.getDepth()) {
pit_type prev = text_->depthHook(pit, par.getDepth());
if (par.layout() == pars[prev].layout()) {
if (prev != pit - 1
&& pars[pit - 1].layout().nextnoindent)
parindent.erase();
} else if (pars[prev].layout().nextnoindent)
parindent.erase();
}
FontInfo const labelfont = text_->labelFont(par);
FontMetrics const & lfm = theFontMetrics(labelfont);
switch (layout.margintype) {
case MARGIN_DYNAMIC:
if (!layout.leftmargin.empty()) {
l_margin += bfm.signedWidth(layout.leftmargin);
}
if (!par.labelString().empty()) {
l_margin += lfm.signedWidth(layout.labelindent);
l_margin += lfm.width(par.labelString());
l_margin += lfm.width(layout.labelsep);
}
break;
case MARGIN_MANUAL: {
l_margin += lfm.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 += lfm.width(labstr);
l_margin += lfm.width(layout.labelsep);
}
}
break;
}
case MARGIN_STATIC: {
l_margin += bfm.signedWidth(layout.leftmargin) * 4
/ (par.getDepth() + 4);
break;
}
case MARGIN_FIRST_DYNAMIC:
if (layout.labeltype == LABEL_MANUAL) {
// if we are at position 0, we are never in the body
if (pos > 0 && pos >= par.beginOfBody())
l_margin += lfm.signedWidth(layout.leftmargin);
else
l_margin += lfm.signedWidth(layout.labelindent);
} else if (pos != 0
// Special case to fix problems with
// theorems (JMarc)
|| (layout.labeltype == LABEL_STATIC
&& layout.latextype == LATEX_ENVIRONMENT
&& !text_->isFirstInSequence(pit))) {
l_margin += lfm.signedWidth(layout.leftmargin);
} else if (!layout.labelIsAbove()) {
l_margin += lfm.signedWidth(layout.labelindent);
l_margin += lfm.width(layout.labelsep);
l_margin += lfm.width(par.labelString());
}
break;
case MARGIN_RIGHT_ADDRESS_BOX: {
#if 0
// The left margin depends on the widest row in this paragraph.
// This code is wrong because it depends on the rows, but at the
// same time this function is used in redoParagraph to construct
// the rows.
ParagraphMetrics const & pm = par_metrics_[pit];
RowList::const_iterator rit = pm.rows().begin();
RowList::const_iterator end = pm.rows().end();
int minfill = max_width;
for ( ; rit != end; ++rit)
if (rit->fill() < minfill)
minfill = rit->fill();
l_margin += bfm.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, lfm.em());
LyXAlignment align = par.getAlign();
// set the correct parindent
if (pos == 0
&& (layout.labeltype == LABEL_NO_LABEL
|| layout.labeltype == LABEL_ABOVE
|| layout.labeltype == LABEL_CENTERED
|| (layout.labeltype == LABEL_STATIC
&& layout.latextype == LATEX_ENVIRONMENT
&& !text_->isFirstInSequence(pit)))
&& (align == LYX_ALIGN_BLOCK || align == LYX_ALIGN_LEFT)
&& !par.params().noindent()
// in some insets, paragraphs are never indented
&& !text_->inset().neverIndent()
// display style insets are always centered, omit indentation
&& !(!par.empty()
&& par.isInset(pos)
&& par.getInset(pos)->display())
&& (!(tclass.isDefaultLayout(par.layout())
|| tclass.isPlainLayout(par.layout()))
|| buffer.params().paragraph_separation
== BufferParams::ParagraphIndentSeparation)) {
// use the parindent of the layout when the
// default indentation is used otherwise use
// the indentation set in the document
// settings
if (buffer.params().getIndentation().asLyXCommand() == "default")
l_margin += bfm.signedWidth(parindent);
else
l_margin += buffer.params().getIndentation().inPixels(*bv_);
}
return l_margin;
}
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 const pit, int const x, int y) const
{
ParagraphMetrics const & pm = par_metrics_[pit];
if (pm.rows().empty())
return;
size_t const nrows = pm.rows().size();
// Use fast lane when drawing is disabled.
if (!pi.pain.isDrawingEnabled()) {
for (size_t i = 0; i != nrows; ++i) {
Row const & row = pm.rows()[i];
// Adapt to cursor row scroll offset if applicable.
int row_x = x - bv_->horizScrollOffset(text_, pit, row.pos());
if (i)
y += row.ascent();
RowPainter rp(pi, *text_, row, row_x, y);
rp.paintOnlyInsets();
y += row.descent();
}
return;
}
int const ww = bv_->workHeight();
Cursor const & cur = bv_->cursor();
DocIterator sel_beg = cur.selectionBegin();
DocIterator sel_end = cur.selectionEnd();
bool selection = cur.selection()
// This is our text.
&& cur.text() == text_
// if the anchor is outside, this is not our selection
&& cur.normalAnchor().text() == text_
&& pit >= sel_beg.pit() && pit <= sel_end.pit();
// We store the begin and end pos of the selection relative to this par
DocIterator sel_beg_par = cur.selectionBegin();
DocIterator sel_end_par = cur.selectionEnd();
// We care only about visible selection.
if (selection) {
if (pit != sel_beg.pit()) {
sel_beg_par.pit() = pit;
sel_beg_par.pos() = 0;
}
if (pit != sel_end.pit()) {
sel_end_par.pit() = pit;
sel_end_par.pos() = sel_end_par.lastpos();
}
}
for (size_t i = 0; i != nrows; ++i) {
Row const & row = pm.rows()[i];
// Adapt to cursor row scroll offset if applicable.
int row_x = x - bv_->horizScrollOffset(text_, pit, row.pos());
if (i)
y += row.ascent();
RowPainter rp(pi, *text_, row, row_x, y);
// It is not needed to draw on screen if we are not inside.
bool const inside = (y + row.descent() >= 0
&& y - row.ascent() < ww);
pi.pain.setDrawingEnabled(inside);
if (!inside) {
// Paint only the insets to set inset cache correctly
// FIXME: remove paintOnlyInsets when we know that positions
// have already been set.
rp.paintOnlyInsets();
y += row.descent();
continue;
}
if (selection)
row.setSelectionAndMargins(sel_beg_par, sel_end_par);
else
row.setSelection(-1, -1);
// The row knows nothing about the paragraph, so we have to check
// whether this row is the first or last and update the margins.
if (row.selection()) {
if (row.sel_beg == 0)
row.begin_margin_sel = sel_beg.pit() < pit;
if (row.sel_end == sel_end_par.lastpos())
row.end_margin_sel = sel_end.pit() > pit;
}
// Row signature; has row changed since last paint?
row.setCrc(pm.computeRowSignature(row, *bv_));
bool row_has_changed = row.changed()
|| bv_->hadHorizScrollOffset(text_, pit, row.pos());
// Take this opportunity to spellcheck the row contents.
if (row_has_changed && pi.do_spellcheck && lyxrc.spellcheck_continuously) {
text_->getPar(pit).spellCheck();
}
// Don't paint the row if a full repaint has not been requested
// and if it has not changed.
if (!pi.full_repaint && !row_has_changed) {
// Paint only the insets if the text itself is
// unchanged.
rp.paintOnlyInsets();
y += row.descent();
continue;
}
// Clear background of this row if paragraph background was not
// already cleared because of a full repaint.
if (!pi.full_repaint && row_has_changed) {
LYXERR(Debug::PAINTING, "Clear rect@("
<< max(row_x, 0) << ", " << y - row.ascent() << ")="
<< width() << " x " << row.height());
pi.pain.fillRectangle(max(row_x, 0), y - row.ascent(),
width(), row.height(), pi.background_color);
}
// Instrumentation for testing row cache (see also
// 12 lines lower):
if (lyxerr.debugging(Debug::PAINTING)
&& (row.selection() || pi.full_repaint || row_has_changed)) {
string const foreword = text_->isMainText() ?
"main text redraw " : "inset text redraw: ";
LYXERR(Debug::PAINTING, foreword << "pit=" << pit << " row=" << i
<< " row_selection=" << row.selection()
<< " full_repaint=" << pi.full_repaint
<< " row_has_changed=" << row_has_changed
<< " drawingEnabled=" << pi.pain.isDrawingEnabled());
}
// 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.paintSelection();
rp.paintAppendix();
rp.paintDepthBar();
rp.paintChangeBar();
if (i == 0 && !row.isRTL())
rp.paintFirst();
if (i == nrows - 1 && row.isRTL())
rp.paintLast();
rp.paintText();
if (i == nrows - 1 && !row.isRTL())
rp.paintLast();
if (i == 0 && row.isRTL())
rp.paintFirst();
rp.paintTooLargeMarks(row_x + row.left_x() < 0,
row_x + row.right_x() > bv_->workWidth());
y += row.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, ".");
}
void TextMetrics::completionPosAndDim(Cursor const & cur, int & x, int & y,
Dimension & dim) const
{
Cursor const & bvcur = cur.bv().cursor();
// get word in front of cursor
docstring word = text_->previousWord(bvcur.top());
DocIterator wordStart = bvcur;
wordStart.pos() -= word.length();
// calculate dimensions of the word
Row row;
row.pit(bvcur.pit());
row.pos(wordStart.pos());
row.endpos(bvcur.pos());
setRowHeight(row);
dim = row.dimension();
// get position on screen of the word start and end
//FIXME: Is it necessary to explicitly set this to false?
wordStart.boundary(false);
Point lxy = cur.bv().getPos(wordStart);
Point rxy = cur.bv().getPos(bvcur);
dim.wid = abs(rxy.x_ - lxy.x_);
// calculate position of word
y = lxy.y_;
x = min(rxy.x_, lxy.x_);
//lyxerr << "wid=" << dim.width() << " x=" << x << " y=" << y << " lxy.x_=" << lxy.x_ << " rxy.x_=" << rxy.x_ << " word=" << word << std::endl;
//lyxerr << " wordstart=" << wordStart << " bvcur=" << bvcur << " cur=" << cur << std::endl;
}
int defaultRowHeight()
{
return int(theFontMetrics(sane_font).maxHeight() * 1.2);
}
} // namespace lyx
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