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lyx_mirror/src/TextMetrics.cpp
Richard Heck 25df3fa83d Defer calculations we may not have to do. 
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@33802 a592a061-630c-0410-9148-cb99ea01b6c8
2010-03-19 15:07:52 +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 "CoordCache.h"
#include "Cursor.h"
#include "CutAndPaste.h"
#include "FuncRequest.h"
#include "HSpace.h"
#include "InsetList.h"
#include "Layout.h"
#include "Length.h"
#include "LyXRC.h"
#include "MetricsInfo.h"
#include "ParagraphParameters.h"
#include "ParIterator.h"
#include "rowpainter.h"
#include "Text.h"
#include "TextClass.h"
#include "VSpace.h"
#include "WordLangTuple.h"
#include "insets/InsetText.h"
#include "mathed/MacroTable.h"
#include "mathed/MathMacroTemplate.h"
#include "frontends/FontMetrics.h"
#include "frontends/Painter.h"
#include "support/debug.h"
#include "support/docstring_list.h"
#include "support/lassert.h"
#include <cstdlib>
using namespace std;
namespace lyx {
using frontend::FontMetrics;
static 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;
}
static 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;
}
static 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;
}
/////////////////////////////////////////////////////////////////////
//
// TextMetrics
//
/////////////////////////////////////////////////////////////////////
TextMetrics::TextMetrics(BufferView * bv, Text * text)
: bv_(bv), text_(text)
{
LASSERT(bv_, /**/);
max_width_ = bv_->workWidth();
dim_.wid = max_width_;
dim_.asc = 10;
dim_.des = 10;
//text_->updateBuffer(bv->buffer());
}
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
{
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)
{
LASSERT(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 main_text_? pm.rightMargin(*bv_) : 0;
}
int TextMetrics::rightMargin(pit_type const pit) const
{
return main_text_? 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, /**/);
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 (!lyxrc.rtl_support || !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
{
if (!lyxrc.rtl_support)
return false;
// 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);
}
bool TextMetrics::isRTLBoundary(pit_type pit, pos_type pos,
Font const & font) const
{
if (!lyxrc.rtl_support
// 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.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();
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);
if (moveCursor > 0)
const_cast<Cursor &>(bv_->cursor()).posForward();
else if (moveCursor < 0) {
Cursor & cursor = const_cast<Cursor &>(bv_->cursor());
if (cursor.pos() >= -moveCursor)
cursor.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.");
bv_->buffer().updateBuffer();
parPos = text_->macrocontextPosition();
LASSERT(!parPos.empty(), /**/);
parPos.pit() = pit;
}
// 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) {
// 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->noFontChange() ?
bufferfont : displayFont(pit, ii->pos);
MacroContext mc(&buffer, parPos);
MetricsInfo mi(bv_, font.fontInfo(), w, mc);
ii->inset->metrics(mi, dim);
Dimension const old_dim = pm.insetDimension(ii->inset);
if (old_dim != dim) {
pm.setInsetDimension(ii->inset, dim);
changed = true;
}
}
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 = rowHeight(pit, first, end);
dim.wid = rowWidth(right_margin, 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);
row.setDimension(dim);
int const max_row_width = max(dim_.wid, dim.wid);
computeRowMetrics(pit, row, max_row_width);
first = end;
++row_index;
pm.dim().wid = 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 = rowHeight(pit, first, first);
dim.wid = rowWidth(right_margin, 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.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.separator = 0;
Paragraph const & par = text_->getPar(pit);
double w = width - row.width();
// FIXME: put back this assertion when the crash on new doc is solved.
//LASSERT(w >= 0, /**/);
//lyxerr << "\ndim_.wid " << dim_.wid << endl;
//lyxerr << "row.width() " << row.width() << endl;
//lyxerr << "w " << w << endl;
bool const is_rtl = text_->isRTL(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
Layout 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);
}
double hfill = 0;
// are there any hfills in the row?
if (int const nh = numberOfHfills(par, row)) {
if (w > 0)
hfill = w / double(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();
// handle alignment inside tabular cells
Inset const & owner = text_->inset();
switch (owner.contentAlignment()) {
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;
}
}
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_->labelFont(par)).
width(layout.labelsep);
if (body_pos <= end)
row.x += row.label_hfill;
}
}
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;
ParagraphMetrics & pm = par_metrics_[pit];
InsetList::const_iterator ii = par.insetList().begin();
InsetList::const_iterator iend = par.insetList().end();
for ( ; ii != iend; ++ii) {
if (ii->pos >= endpos || ii->pos < row.pos()
|| (ii->inset->lyxCode() != SPACE_CODE ||
!ii->inset->isStretchableSpace()))
continue;
Dimension dim = row.dimension();
if (pm.hfillExpansion(row, ii->pos))
dim.wid = int(ii->pos >= body_pos ?
max(hfill, 5.0) : row.label_hfill);
else
dim.wid = 5;
// Cache the inset dimension.
bv_->coordCache().insets().add(ii->inset, dim);
pm.setInsetDimension(ii->inset, dim);
}
}
int TextMetrics::labelFill(pit_type const pit, Row const & row) const
{
Paragraph const & par = text_->getPar(pit);
pos_type last = par.beginOfBody();
LASSERT(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_->labelFont(par));
return max(0, fm.width(label) - w);
}
// 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;
}
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_ > 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
pos_type TextMetrics::rowBreakPoint(int width, pit_type const pit,
pos_type pos) const
{
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;
Layout const & layout = par.layout();
if (layout.margintype == MARGIN_RIGHT_ADDRESS_BOX)
return addressBreakPoint(pos, par);
pos_type const body_pos = par.beginOfBody();
// check for possible inline completion
DocIterator const & inlineCompletionPos = bv_->inlineCompletionPos();
pos_type inlineCompletionLPos = -1;
if (inlineCompletionPos.inTexted()
&& inlineCompletionPos.text() == text_
&& inlineCompletionPos.pit() == pit) {
// draw logically behind the previous character
inlineCompletionLPos = inlineCompletionPos.pos() - 1;
}
// 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;
docstring const s(1, char_type(0x00B6));
Font f;
int par_marker_width = theFontMetrics(f).width(s);
FontIterator fi = FontIterator(*this, par, pit, pos);
pos_type point = end;
pos_type i = pos;
ParagraphList const & pars_ = text_->paragraphs();
bool const draw_par_end_marker = lyxrc.paragraph_markers
&& size_type(pit + 1) < pars_.size();
for ( ; i < end; ++i, ++fi) {
int thiswidth = pm.singleWidth(i, *fi);
if (draw_par_end_marker && i == end - 1)
// enlarge the last character to hold the end-of-par marker
thiswidth += par_marker_width;
// add inline completion width
if (inlineCompletionLPos == i) {
docstring const & completion = bv_->inlineCompletion();
if (completion.length() > 0)
thiswidth += theFontMetrics(*fi).width(completion);
}
// add the auto-hfill from label end to the body
if (body_pos && i == body_pos) {
FontMetrics const & fm = theFontMetrics(
text_->labelFont(par));
int add = fm.width(layout.labelsep);
if (par.isLineSeparator(i - 1))
add -= singleWidth(pit, i - 1);
add = 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;
}
Inset const * inset = 0;
// Break before...
if (i + 1 < end) {
if ((inset = par.getInset(i + 1)) && inset->display()) {
point = i + 1;
break;
}
// ...and after.
if ((inset = par.getInset(i)) && inset->display()) {
point = i + 1;
break;
}
}
inset = par.getInset(i);
if (!inset || inset->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
{
// 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);
// check for possible inline completion
DocIterator const & inlineCompletionPos = bv_->inlineCompletionPos();
pos_type inlineCompletionLPos = -1;
if (inlineCompletionPos.inTexted()
&& inlineCompletionPos.text() == text_
&& inlineCompletionPos.pit() == pit) {
// draw logically behind the previous character
inlineCompletionLPos = inlineCompletionPos.pos() - 1;
}
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_->labelFont(par));
w += fm.width(par.layout().labelsep);
if (par.isLineSeparator(i - 1))
w -= singleWidth(pit, i - 1);
w = max(w, label_end);
}
// a line separator at the end of a line (but not at the end of a
// paragraph) will not be drawn and should therefore not count for
// the row width.
if (!par.isLineSeparator(i) || i != end - 1 || end == par.size())
w += pm.singleWidth(i, *fi);
// add inline completion width
if (inlineCompletionLPos == i) {
docstring const & completion = bv_->inlineCompletion();
if (completion.length() > 0)
w += theFontMetrics(*fi).width(completion);
}
}
}
// count the paragraph end marker.
if (end == par.size() && lyxrc.paragraph_markers) {
ParagraphList const & pars_ = text_->paragraphs();
if (size_type(pit + 1) < pars_.size()) {
// enlarge the last character to hold the
// end-of-par marker
docstring const s(1, char_type(0x00B6));
Font f;
w += theFontMetrics(f).width(s);
}
}
if (body_pos > 0 && body_pos >= end) {
FontMetrics const & fm = theFontMetrics(
text_->labelFont(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;
}
Dimension TextMetrics::rowHeight(pit_type const pit, pos_type const first,
pos_type const end, bool topBottomSpace) 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 :)
Layout 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 = displayFont(pit, first);
FontSize const tmpsize = font.fontInfo().size();
font.fontInfo() = text_->layoutFont(pit);
FontSize const size = font.fontInfo().size();
font.fontInfo().setSize(tmpsize);
FontInfo labelfont = text_->labelFont(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(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) {
if (ii->pos >= first && ii->pos < end) {
Dimension const & dim = pm.insetDimension(ii->inset);
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;
FontSize maxsize =
par.highestFontInRange(first, end, size);
if (maxsize > font.fontInfo().size()) {
// use standard paragraph font with the maximal size
FontInfo maxfont = font.fontInfo();
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();
Inset const & inset = text_->inset();
// is it a top line?
if (first == 0 && topBottomSpace) {
BufferParams const & bufparams = buffer.params();
// some parskips VERY EASY IMPLEMENTATION
if (bufparams.paragraph_separation
== BufferParams::ParagraphSkipSeparation
&& inset.lyxCode() != ERT_CODE
&& inset.lyxCode() != 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(par));
}
// special code for the top label
if ((layout.labeltype == LABEL_TOP_ENVIRONMENT
|| layout.labeltype == LABEL_BIBLIO
|| layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)
&& text_->isFirstInSequence(pit)
&& !par.labelString().empty())
{
labeladdon = int(
labelfont_metrics.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];
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 = text_->outerHook(pit);
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() && topBottomSpace) {
// 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 = 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);
}
}
}
// 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_ && topBottomSpace) {
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 Dimension(0, 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);
Bidi bidi;
bidi.computeTables(par, buffer, row);
pos_type vc = row.pos();
pos_type end = row.endpos();
pos_type c = 0;
Layout 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;
}
// if the first character is a separator, we are in RTL
// text. This character will not be painted on screen
// and thus we should not count it and skip to the next.
if (par.isSeparator(bidi.vis2log(vc)))
++vc;
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_->labelFont(par));
tmpx += row.label_hfill + fm.width(layout.labelsep);
if (par.isLineSeparator(body_pos - 1))
tmpx -= singleWidth(pit, body_pos - 1);
}
tmpx += singleWidth(pit, c);
if (par.isSeparator(c) && c >= body_pos)
tmpx += row.separator;
++vc;
}
if ((tmpx + last_tmpx) / 2 > x) {
tmpx = last_tmpx;
left_side = true;
}
LASSERT(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(par) : false;
if (lastrow &&
((rtl && left_side && vc == row.pos() && x < tmpx - 5) ||
(!rtl && !left_side && vc == end && x > tmpx + 5))) {
if (!par.isNewline(end - 1))
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);
LASSERT(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() + 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();
LASSERT(!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);
bool bound = false; // is modified by getColumnNearX
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, yy);
//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 * inset_before = pos ? pars[pit].getInset(pos - 1) : 0;
// This should be just before or just behind the
// cursor position set above.
LASSERT(inset == inset_before
|| inset == pars[pit].getInset(pos), /**/);
// Make sure the cursor points to the position before
// this inset.
if (inset == inset_before) {
--cur.pos();
cur.boundary(false);
}
// Try to descend recursively inside the inset.
inset = inset->editXY(cur, x, yy);
if (cur.top().text() == text_)
cur.setCurrentFont();
return inset;
}
void TextMetrics::setCursorFromCoordinates(Cursor & cur, int const x, int const y)
{
LASSERT(text_ == cur.text(), /**/);
pit_type 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;
LASSERT(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 = row.pos() + getColumnNearX(pit, 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
Inset * TextMetrics::checkInsetHit(int x, int y)
{
pit_type pit = getPitNearY(y);
LASSERT(pit != -1, return 0);
Paragraph const & par = text_->paragraphs()[pit];
ParagraphMetrics const & pm = par_metrics_[pit];
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 (!bv_->coordCache().getInsets().has(inset)) {
LYXERR(Debug::DEBUG, "inset has no cached position");
return 0;
}
Dimension const & dim = pm.insetDimension(inset);
Point p = bv_->coordCache().getInsets().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 inset;
}
}
LYXERR(Debug::DEBUG, "No inset hit. ");
return 0;
}
int TextMetrics::cursorX(CursorSlice const & sl,
bool boundary) const
{
LASSERT(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(par) ? row_pos : end;
else if (ppos > row_pos && ppos >= end)
//FIXME: this code is never reached!
// (see http://www.lyx.org/trac/changeset/8251)
// 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;
// check for possible inline completion in this row
DocIterator const & inlineCompletionPos = bv_->inlineCompletionPos();
pos_type inlineCompletionVPos = -1;
if (inlineCompletionPos.inTexted()
&& inlineCompletionPos.text() == text_
&& inlineCompletionPos.pit() == pit
&& inlineCompletionPos.pos() - 1 >= row_pos
&& inlineCompletionPos.pos() - 1 < end) {
// draw logically behind the previous character
inlineCompletionVPos = bidi.log2vis(inlineCompletionPos.pos() - 1);
}
// 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);
if (lyxrc.paragraph_markers && text_->isRTL(par)) {
ParagraphList const & pars_ = text_->paragraphs();
if (size_type(pit + 1) < pars_.size()) {
FontInfo f;
docstring const s = docstring(1, char_type(0x00B6));
x += theFontMetrics(f).width(s);
}
}
// Inline completion RTL special case row_pos == cursor_pos:
// "__|b" => cursor_pos is right of __
if (row_pos == inlineCompletionVPos && row_pos == cursor_vpos) {
font = displayFont(pit, row_pos + 1);
docstring const & completion = bv_->inlineCompletion();
if (font.isRightToLeft() && completion.length() > 0)
x += theFontMetrics(font.fontInfo()).width(completion);
}
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_->labelFont(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 = displayFont(pit, pos);
}
x += pm.singleWidth(pos, font);
// Inline completion RTL case:
// "a__|b", __ of b => non-boundary a-pos is right of __
if (vpos + 1 == inlineCompletionVPos
&& (vpos + 1 < cursor_vpos || !boundary_correction)) {
font = displayFont(pit, vpos + 1);
docstring const & completion = bv_->inlineCompletion();
if (font.isRightToLeft() && completion.length() > 0)
x += theFontMetrics(font.fontInfo()).width(completion);
}
// Inline completion LTR case:
// "b|__a", __ of b => non-boundary a-pos is in front of __
if (vpos == inlineCompletionVPos
&& (vpos + 1 < cursor_vpos || boundary_correction)) {
font = displayFont(pit, vpos);
docstring const & completion = bv_->inlineCompletion();
if (!font.isRightToLeft() && completion.length() > 0)
x += theFontMetrics(font.fontInfo()).width(completion);
}
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 << 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(), /**/);
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(), /**/);
// 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)
{
LASSERT(text_ == cur.text(), /**/);
if (cur.lastpos() == 0) {
// Paragraph is empty, so we just go forward
text_->cursorForward(cur);
} else {
cur.resetAnchor();
cur.setSelection(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(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
{
LASSERT(pit >= 0, /**/);
LASSERT(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();
LASSERT(pit >= 0, /**/);
LASSERT(pit < int(pars.size()), /**/);
Paragraph const & par = pars[pit];
LASSERT(pos >= 0, /**/);
LASSERT(pos <= par.size(), /**/);
Buffer const & buffer = bv_->buffer();
//lyxerr << "TextMetrics::leftMargin: pit: " << pit << " pos: " << pos << endl;
DocumentClass const & tclass = buffer.params().documentClass();
Layout const & layout = par.layout();
docstring parindent = layout.parindent;
int l_margin = 0;
if (text_->isMainText())
l_margin += bv_->leftMargin();
l_margin += theFontMetrics(buffer.params().getFont()).signedWidth(
tclass.leftmargin());
if (par.getDepth() != 0) {
// find the next level paragraph
pit_type newpar = text_->outerHook(pit);
if (newpar != pit_type(pars.size())) {
if (pars[newpar].layout().isEnvironment()) {
l_margin = leftMargin(max_width, newpar);
}
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 in standard classes. The 1.3.x
// code compared depths too, but it does not seem necessary
// (JMarc)
if (tclass.isDefaultLayout(par.layout())
&& pit > 0 && pars[pit - 1].layout().nextnoindent)
parindent.erase();
FontInfo const labelfont = text_->labelFont(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.labelString().empty()) {
l_margin += labelfont_metrics.signedWidth(layout.labelindent);
l_margin += labelfont_metrics.width(par.labelString());
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 we are at position 0, we are never in the body
if (pos > 0 && 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
&& !text_->isFirstInSequence(pit))) {
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.labelString());
}
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
&& !text_->isFirstInSequence(pit)))
&& align == LYX_ALIGN_BLOCK
&& !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 += theFontMetrics(buffer.params().getFont()).signedWidth(
parindent);
else
l_margin += buffer.params().getIndentation().inPixels(*bv_);
}
return l_margin;
}
int TextMetrics::singleWidth(pit_type pit, pos_type pos) const
{
ParagraphMetrics const & pm = par_metrics_[pit];
return pm.singleWidth(pos, displayFont(pit, pos));
}
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
{
BufferParams const & bparams = bv_->buffer().params();
ParagraphMetrics const & pm = par_metrics_[pit];
if (pm.rows().empty())
return;
Bidi bidi;
bool const original_drawing_state = pi.pain.isDrawingEnabled();
int const ww = bv_->workHeight();
size_t const nrows = pm.rows().size();
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.anchor().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];
if (i)
y += row.ascent();
bool const inside = (y + row.descent() >= 0
&& y - row.ascent() < ww);
// It is not needed to draw on screen if we are not inside.
pi.pain.setDrawingEnabled(inside && original_drawing_state);
RowPainter rp(pi, *text_, pit, row, bidi, x, y);
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, bparams));
bool row_has_changed = row.changed();
// Take this opportunity to spellcheck the row contents.
if (row_has_changed && lyxrc.spellcheck_continuously) {
WordLangTuple wl;
// dummy variable, not used.
static docstring_list suggestions;
pos_type from = row.pos();
pos_type to = row.endpos();
while (from < row.endpos()) {
text_->getPar(pit).spellCheck(from, to, wl, suggestions, false);
from = to + 1;
}
}
// 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) {
pi.pain.fillRectangle(x, y - row.ascent(),
width(), row.height(), pi.background_color);
}
if (row.selection())
drawRowSelection(pi, x, row, cur, pit);
// Instrumentation for testing row cache (see also
// 12 lines lower):
if (lyxerr.debugging(Debug::PAINTING) && inside
&& (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);
}
// 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();
bool const is_rtl = text_->isRTL(text_->getPar(pit));
if (i == 0 && !is_rtl)
rp.paintFirst();
if (i == nrows - 1 && is_rtl)
rp.paintLast();
rp.paintText();
if (i == nrows - 1 && !is_rtl)
rp.paintLast();
if (i == 0 && is_rtl)
rp.paintFirst();
y += row.descent();
// Restore full_repaint status.
pi.full_repaint = tmp;
}
// Re-enable screen drawing for future use of the painter.
pi.pain.setDrawingEnabled(original_drawing_state);
//LYXERR(Debug::PAINTING, ".");
}
void TextMetrics::drawRowSelection(PainterInfo & pi, int x, Row const & row,
Cursor const & curs, pit_type pit) const
{
DocIterator beg = curs.selectionBegin();
beg.pit() = pit;
beg.pos() = row.sel_beg;
DocIterator end = curs.selectionEnd();
end.pit() = pit;
end.pos() = row.sel_end;
bool const begin_boundary = beg.pos() >= row.endpos();
bool const end_boundary = row.sel_end == row.endpos();
DocIterator cur = beg;
cur.boundary(begin_boundary);
int x1 = cursorX(beg.top(), begin_boundary);
int x2 = cursorX(end.top(), end_boundary);
int const y1 = bv_->getPos(cur, cur.boundary()).y_ - row.ascent();
int const y2 = y1 + row.height();
int const rm = text_->isMainText() ? bv_->rightMargin() : 0;
int const lm = text_->isMainText() ? bv_->leftMargin() : 0;
// draw the margins
if (row.begin_margin_sel) {
if (text_->isRTL(beg.paragraph())) {
pi.pain.fillRectangle(x + x1, y1, width() - rm - x1, y2 - y1,
Color_selection);
} else {
pi.pain.fillRectangle(x + lm, y1, x1 - lm, y2 - y1,
Color_selection);
}
}
if (row.end_margin_sel) {
if (text_->isRTL(beg.paragraph())) {
pi.pain.fillRectangle(x + lm, y1, x2 - lm, y2 - y1,
Color_selection);
} else {
pi.pain.fillRectangle(x + x2, y1, width() - rm - 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 draw_now = 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);
draw_now = 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) || draw_now) {
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;
}
}
}
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();
// get position on screen of the word start and end
Point lxy = cur.bv().getPos(wordStart, false);
Point rxy = cur.bv().getPos(bvcur, bvcur.boundary());
// calculate dimensions of the word
dim = rowHeight(bvcur.pit(), wordStart.pos(), bvcur.pos(), false);
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 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(sane_font).maxHeight() * 1.2);
}
} // namespace lyx
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