+/**
+ * \file RowPainter.cpp
+ * This file is part of LyX, the document processor.
+ * Licence details can be found in the file COPYING.
+ *
+ * \author various
+ * \author John Levon
+ *
+ * Full author contact details are available in file CREDITS.
+ */
+
+#include <config.h>
+#include <algorithm>
+
+#include "RowPainter.h"
+
+#include "Buffer.h"
+#include "CoordCache.h"
+#include "Cursor.h"
+#include "BufferParams.h"
+#include "BufferView.h"
+#include "Changes.h"
+#include "Language.h"
+#include "Layout.h"
+#include "LyXRC.h"
+#include "Row.h"
+#include "MetricsInfo.h"
+#include "Paragraph.h"
+#include "ParagraphMetrics.h"
+#include "ParagraphParameters.h"
+#include "TextMetrics.h"
+#include "VSpace.h"
+
+#include "frontends/FontMetrics.h"
+#include "frontends/Painter.h"
+
+#include "insets/InsetText.h"
+
+#include "mathed/InsetMath.h"
+
+#include "support/debug.h"
+#include "support/gettext.h"
+#include "support/textutils.h"
+
+#include "support/lassert.h"
+#include <boost/crc.hpp>
+
+using namespace std;
+
+namespace lyx {
+
+using frontend::Painter;
+using frontend::FontMetrics;
+
+
+RowPainter::RowPainter(PainterInfo & pi,
+ Text const & text, pit_type pit, Row const & row, int x, int y)
+ : pi_(pi), text_(text),
+ text_metrics_(pi_.base.bv->textMetrics(&text)),
+ pars_(text.paragraphs()),
+ row_(row), pit_(pit), par_(text.paragraphs()[pit]),
+ pm_(text_metrics_.parMetrics(pit)), change_(pi_.change_),
+ xo_(x), yo_(y), width_(text_metrics_.width()),
+ solid_line_thickness_(1.0), solid_line_offset_(1),
+ dotted_line_thickness_(1.0), dotted_line_offset_(2)
+{
+ bidi_.computeTables(par_, pi_.base.bv->buffer(), row_);
+
+ if (lyxrc.zoom >= 200) {
+ // derive the line thickness from zoom factor
+ // the zoom is given in percent
+ // (increase thickness at 250%, 450% etc.)
+ solid_line_thickness_ = (float)(int((lyxrc.zoom + 50) / 200.0));
+ // adjust line_offset_ too
+ solid_line_offset_ = 1 + int(0.5 * solid_line_thickness_);
+ }
+ if (lyxrc.zoom >= 100) {
+ // derive the line thickness from zoom factor
+ // the zoom is given in percent
+ // (increase thickness at 150%, 250% etc.)
+ dotted_line_thickness_ = (float)(int((lyxrc.zoom + 50) / 100.0));
+ // adjust line_offset_ too
+ dotted_line_offset_ = int(0.5 * dotted_line_thickness_) + 1;
+ }
+
+ x_ = row_.x + xo_;
+
+ //lyxerr << "RowPainter: x: " << x_ << " xo: " << xo_ << " yo: " << yo_ << endl;
+ //row_.dump();
+
+ LBUFERR(pit >= 0);
+ LBUFERR(pit < int(text.paragraphs().size()));
+}
+
+
+FontInfo RowPainter::labelFont() const
+{
+ FontInfo f = text_.labelFont(par_);
+ // selected text?
+ if (row_.begin_margin_sel || pi_.selected)
+ f.setPaintColor(Color_selectiontext);
+ return f;
+}
+
+
+int RowPainter::leftMargin() const
+{
+ return text_metrics_.leftMargin(text_metrics_.width(), pit_,
+ row_.pos());
+}
+
+// If you want to debug inset metrics uncomment the following line:
+//#define DEBUG_METRICS
+// This draws green lines around each inset.
+
+
+void RowPainter::paintInset(Inset const * inset, pos_type const pos)
+{
+ Font const font = text_metrics_.displayFont(pit_, pos);
+
+ LASSERT(inset, return);
+ // Backup full_repaint status because some insets (InsetTabular)
+ // requires a full repaint
+ bool pi_full_repaint = pi_.full_repaint;
+
+ pi_.base.font = inset->inheritFont() ? font.fontInfo() :
+ pi_.base.bv->buffer().params().getFont().fontInfo();
+ pi_.ltr_pos = (bidi_.level(pos) % 2 == 0);
+ Change prev_change = change_;
+ pi_.change_ = change_.changed() ? change_ : par_.lookupChange(pos);
+
+ int const x1 = int(x_);
+ pi_.base.bv->coordCache().insets().add(inset, x1, yo_);
+ // insets are painted completely. Recursive
+ // FIXME: it is wrong to completely paint the background
+ // if we want to do single row painting.
+ inset->drawBackground(pi_, x1, yo_);
+ inset->drawSelection(pi_, x1, yo_);
+ inset->draw(pi_, x1, yo_);
+
+ Dimension const & dim = pm_.insetDimension(inset);
+
+ paintForeignMark(x_, font.language(), dim.descent());
+
+ x_ += dim.width();
+
+ // Restore full_repaint status.
+ pi_.full_repaint = pi_full_repaint;
+ pi_.change_ = prev_change;
+
+#ifdef DEBUG_METRICS
+ int const x2 = x1 + dim.wid;
+ int const y1 = yo_ + dim.des;
+ int const y2 = yo_ - dim.asc;
+ pi_.pain.line(x1, y1, x1, y2, Color_green);
+ pi_.pain.line(x1, y1, x2, y1, Color_green);
+ pi_.pain.line(x2, y1, x2, y2, Color_green);
+ pi_.pain.line(x1, y2, x2, y2, Color_green);
+#endif
+}
+
+
+void RowPainter::paintChars(pos_type & vpos, Font const & font)
+{
+ // This method takes up 70% of time when typing
+ pos_type pos = bidi_.vis2log(vpos);
+ pos_type start_pos = pos;
+ // first character
+ docstring str;
+ str.reserve(100);
+ char_type const c = par_.getChar(pos);
+ str.push_back(c);
+
+ FontSpan const font_span = par_.fontSpan(pos);
+ // Track-change status.
+ Change const & change_running = par_.lookupChange(pos);
+ // spelling correct?
+ bool const spell_state =
+ lyxrc.spellcheck_continuously && par_.isMisspelled(pos);
+
+ // collect as much similar chars as we can
+ pos_type const end = row_.endpos();
+ for (++vpos ; vpos < end ; ++vpos) {
+ pos = bidi_.vis2log(vpos);
+
+ if (!font_span.inside(pos))
+ break;
+
+ bool const new_spell_state =
+ lyxrc.spellcheck_continuously && par_.isMisspelled(pos);
+ if (new_spell_state != spell_state)
+ // Spell checker state changed here.
+ break;
+
+ Change const & change = par_.lookupChange(pos);
+ if (!change_running.isSimilarTo(change))
+ // Track change type or author has changed.
+ break;
+
+ char_type const c = par_.getChar(pos);
+
+ if (c == '\t')
+ break;
+
+ if (!isPrintableNonspace(c))
+ break;
+
+ str.push_back(c);
+ }
+
+ // Make pos point to the last character in the string.
+ // Using "pos = bidi_.vis2log(vpos)" does not work for some reason.
+ if (vpos < end)
+ pos = bidi_.vis2log(vpos - 1);
+
+ // Now make pos point to the position _after_ the string.
+ // Using vis2log for that is not a good idea in general, we
+ // want logical ordering.
+ if (font.isVisibleRightToLeft())
+ --pos;
+ else
+ ++pos;
+
+ if (str[0] == '\t')
+ str.replace(0,1,from_ascii(" "));
+
+ /* Because we do our own bidi, at this point the strings are
+ * already in visual order. However, Qt also applies its own
+ * bidi algorithm to strings that it paints to the screen.
+ * Therefore, if we were to paint Hebrew/Arabic words as a
+ * single string, the letters in the words would get reversed
+ * again. In order to avoid that, we force LTR drawing.
+ * See also http://thread.gmane.org/gmane.editors.lyx.devel/79740
+ * for an earlier thread on the subject
+ */
+ if (font.isVisibleRightToLeft()) {
+ reverse(str.begin(), str.end());
+ // If the string is reversed, the positions need to be adjusted
+ ++pos;
+ ++start_pos;
+ swap(start_pos, pos);
+ }
+
+ // at least part of text selected?
+ bool const some_sel = (pos >= row_.sel_beg && start_pos < row_.sel_end)
+ || pi_.selected;
+ // all the text selected?
+ bool const all_sel = (start_pos >= row_.sel_beg && pos < row_.sel_end)
+ || pi_.selected;
+
+ if (all_sel) {
+ Font copy = font;
+ copy.fontInfo().setPaintColor(Color_selectiontext);
+ x_ += pi_.pain.text(int(x_), yo_, str, copy);
+ } else if (change_running.changed()) {
+ Font copy = font;
+ copy.fontInfo().setPaintColor(change_running.color());
+ x_ += pi_.pain.text(int(x_), yo_, str, copy);
+ } else if (!some_sel) {
+ x_ += pi_.pain.text(int(x_), yo_, str, font);
+ } else {
+ x_ += pi_.pain.text(int(x_), yo_, str, font, Color_selectiontext,
+ max(row_.sel_beg, start_pos) - start_pos,
+ min(row_.sel_end, pos) - start_pos);
+ }
+}
+
+
+void RowPainter::paintSeparator(double orig_x, double width,
+ FontInfo const & font)
+{
+ pi_.pain.textDecoration(font, int(orig_x), yo_, int(width));
+ x_ += width;
+}
+
+
+void RowPainter::paintForeignMark(double orig_x, Language const * lang,
+ int desc)
+{
+ if (!lyxrc.mark_foreign_language)
+ return;
+ if (lang == latex_language)
+ return;
+ if (lang == pi_.base.bv->buffer().params().language)
+ return;
+
+ int const y = yo_ + solid_line_offset_ + desc + int(solid_line_thickness_/2);
+ pi_.pain.line(int(orig_x), y, int(x_), y, Color_language,
+ Painter::line_solid, solid_line_thickness_);
+}
+
+
+void RowPainter::paintMisspelledMark(double orig_x, bool changed)
+{
+ // if changed the misspelled marker gets placed slightly lower than normal
+ // to avoid drawing at the same vertical offset
+ float const y = yo_ + solid_line_offset_ + solid_line_thickness_
+ + (changed ? solid_line_thickness_ + 1 : 0)
+ + dotted_line_offset_;
+ pi_.pain.line(int(orig_x), int(y), int(x_), int(y), Color_error,
+ Painter::line_onoffdash, dotted_line_thickness_);
+}
+
+
+void RowPainter::paintFromPos(pos_type & vpos, bool changed)
+{
+ pos_type const pos = bidi_.vis2log(vpos);
+ Font const font = text_metrics_.displayFont(pit_, pos);
+ double const orig_x = x_;
+
+ paintChars(vpos, font);
+ paintForeignMark(orig_x, font.language());
+
+ // Paint the spelling mark if needed.
+ if (lyxrc.spellcheck_continuously && par_.isMisspelled(pos)) {
+ // check for cursor position
+ // don't draw misspelled marker for words at cursor position
+ // we don't want to disturb the process of text editing
+ BufferView const * bv = pi_.base.bv;
+ DocIterator const nw = bv->cursor().newWord();
+ bool new_word = false;
+ if (!nw.empty() && par_.id() == nw.paragraph().id()) {
+ pos_type cpos = nw.pos();
+ if (cpos > 0 && cpos == par_.size() && !par_.isWordSeparator(cpos-1))
+ --cpos;
+ else if (cpos > 0 && par_.isWordSeparator(cpos))
+ --cpos;
+ new_word = par_.isSameSpellRange(pos, cpos) ;
+ }
+ if (!new_word)
+ paintMisspelledMark(orig_x, changed);
+ }
+}
+
+
+void RowPainter::paintChangeBar()
+{
+ pos_type const start = row_.pos();
+ pos_type end = row_.endpos();
+
+ if (par_.size() == end) {
+ // this is the last row of the paragraph;
+ // thus, we must also consider the imaginary end-of-par character
+ end++;
+ }
+
+ if (start == end || !par_.isChanged(start, end))
+ return;
+
+ int const height = text_metrics_.isLastRow(pit_, row_)
+ ? row_.ascent()
+ : row_.height();
+
+ pi_.pain.fillRectangle(5, yo_ - row_.ascent(), 3, height, Color_changebar);
+}
+
+
+void RowPainter::paintAppendix()
+{
+ // only draw the appendix frame once (for the main text)
+ if (!par_.params().appendix() || !text_.isMainText())
+ return;
+
+ int y = yo_ - row_.ascent();
+
+ if (par_.params().startOfAppendix())
+ y += 2 * defaultRowHeight();
+
+ pi_.pain.line(1, y, 1, yo_ + row_.height(), Color_appendix);
+ pi_.pain.line(width_ - 2, y, width_ - 2, yo_ + row_.height(), Color_appendix);
+}
+
+
+void RowPainter::paintDepthBar()
+{
+ depth_type const depth = par_.getDepth();
+
+ if (depth <= 0)
+ return;
+
+ depth_type prev_depth = 0;
+ if (!text_metrics_.isFirstRow(pit_, row_)) {
+ pit_type pit2 = pit_;
+ if (row_.pos() == 0)
+ --pit2;
+ prev_depth = pars_[pit2].getDepth();
+ }
+
+ depth_type next_depth = 0;
+ if (!text_metrics_.isLastRow(pit_, row_)) {
+ pit_type pit2 = pit_;
+ if (row_.endpos() >= pars_[pit2].size())
+ ++pit2;
+ next_depth = pars_[pit2].getDepth();
+ }
+
+ for (depth_type i = 1; i <= depth; ++i) {
+ int const w = nestMargin() / 5;
+ int x = int(xo_) + w * i;
+ // only consider the changebar space if we're drawing outermost text
+ if (text_.isMainText())
+ x += changebarMargin();
+
+ int const starty = yo_ - row_.ascent();
+ int const h = row_.height() - 1 - (i - next_depth - 1) * 3;
+
+ pi_.pain.line(x, starty, x, starty + h, Color_depthbar);
+
+ if (i > prev_depth)
+ pi_.pain.fillRectangle(x, starty, w, 2, Color_depthbar);
+ if (i > next_depth)
+ pi_.pain.fillRectangle(x, starty + h, w, 2, Color_depthbar);
+ }
+}
+
+
+int RowPainter::paintAppendixStart(int y)
+{
+ FontInfo pb_font = sane_font;
+ pb_font.setColor(Color_appendix);
+ pb_font.decSize();
+
+ int w = 0;
+ int a = 0;
+ int d = 0;
+
+ docstring const label = _("Appendix");
+ theFontMetrics(pb_font).rectText(label, w, a, d);
+
+ int const text_start = int(xo_ + (width_ - w) / 2);
+ int const text_end = text_start + w;
+
+ pi_.pain.rectText(text_start, y + d, label, pb_font, Color_none, Color_none);
+
+ pi_.pain.line(int(xo_ + 1), y, text_start, y, Color_appendix);
+ pi_.pain.line(text_end, y, int(xo_ + width_ - 2), y, Color_appendix);
+
+ return 3 * defaultRowHeight();
+}
+
+
+void RowPainter::paintFirst()
+{
+ BufferParams const & bparams = pi_.base.bv->buffer().params();
+ Layout const & layout = par_.layout();
+
+ int y_top = 0;
+
+ // start of appendix?
+ if (par_.params().startOfAppendix())
+ y_top += paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
+
+ if (bparams.paragraph_separation == BufferParams::ParagraphSkipSeparation
+ && pit_ != 0) {
+ if (layout.latextype == LATEX_PARAGRAPH
+ && !par_.getDepth()) {
+ y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
+ } else {
+ Layout const & playout = pars_[pit_ - 1].layout();
+ if (playout.latextype == LATEX_PARAGRAPH
+ && !pars_[pit_ - 1].getDepth()) {
+ // is it right to use defskip here, too? (AS)
+ y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
+ }
+ }
+ }
+
+ bool const is_first =
+ text_.isFirstInSequence(pit_) || !layout.isParagraphGroup();
+ //lyxerr << "paintFirst: " << par_.id() << " is_seq: " << is_seq << endl;
+
+ if (layout.labelIsInline()
+ && (layout.labeltype != LABEL_STATIC || is_first)) {
+ paintLabel();
+ } else if (is_first && layout.labelIsAbove()) {
+ paintTopLevelLabel();
+ }
+}
+
+
+void RowPainter::paintLabel()
+{
+ docstring const str = par_.labelString();
+ if (str.empty())
+ return;
+
+ bool const is_rtl = text_.isRTL(par_);
+ Layout const & layout = par_.layout();
+ FontInfo const font = labelFont();
+ FontMetrics const & fm = theFontMetrics(font);
+ double x = x_;
+
+ if (is_rtl) {
+ x = width_ - leftMargin()
+ + fm.width(layout.labelsep);
+ } else {
+ x = x_ - fm.width(layout.labelsep)
+ - fm.width(str);
+ }
+
+ pi_.pain.text(int(x), yo_, str, font);
+}
+
+
+void RowPainter::paintTopLevelLabel()
+{
+ BufferParams const & bparams = pi_.base.bv->buffer().params();
+ bool const is_rtl = text_.isRTL(par_);
+ ParagraphParameters const & pparams = par_.params();
+ Layout const & layout = par_.layout();
+ FontInfo const font = labelFont();
+ docstring const str = par_.labelString();
+ if (str.empty())
+ return;
+
+ double spacing_val = 1.0;
+ if (!pparams.spacing().isDefault())
+ spacing_val = pparams.spacing().getValue();
+ else
+ spacing_val = bparams.spacing().getValue();
+
+ FontMetrics const & fm = theFontMetrics(font);
+
+ int const labeladdon = int(fm.maxHeight()
+ * layout.spacing.getValue() * spacing_val);
+
+ int maxdesc =
+ int(fm.maxDescent() * layout.spacing.getValue() * spacing_val
+ + (layout.labelbottomsep * defaultRowHeight()));
+
+ double x = x_;
+ if (layout.labeltype == LABEL_CENTERED) {
+ if (is_rtl)
+ x = leftMargin();
+ x += (width_ - text_metrics_.rightMargin(pm_) - leftMargin()) / 2;
+ x -= fm.width(str) / 2;
+ } else if (is_rtl) {
+ x = width_ - leftMargin() - fm.width(str);
+ }
+ pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
+}
+
+
+/** Check if the current paragraph is the last paragraph in a
+ proof environment */
+static int getEndLabel(pit_type p, Text const & text)
+{
+ ParagraphList const & pars = text.paragraphs();
+ pit_type pit = p;
+ depth_type par_depth = pars[p].getDepth();
+ while (pit != pit_type(pars.size())) {
+ Layout const & layout = pars[pit].layout();
+ int const endlabeltype = layout.endlabeltype;
+
+ if (endlabeltype != END_LABEL_NO_LABEL) {
+ if (p + 1 == pit_type(pars.size()))
+ return endlabeltype;
+
+ depth_type const next_depth =
+ pars[p + 1].getDepth();
+ if (par_depth > next_depth ||
+ (par_depth == next_depth && layout != pars[p + 1].layout()))
+ return endlabeltype;
+ break;
+ }
+ if (par_depth == 0)
+ break;
+ pit = text.outerHook(pit);
+ if (pit != pit_type(pars.size()))
+ par_depth = pars[pit].getDepth();
+ }
+ return END_LABEL_NO_LABEL;
+}
+
+
+void RowPainter::paintLast()
+{
+ bool const is_rtl = text_.isRTL(par_);
+ int const endlabel = getEndLabel(pit_, text_);
+
+ // paint imaginary end-of-paragraph character
+
+ Change const & change = par_.lookupChange(par_.size());
+ if (change.changed()) {
+ FontMetrics const & fm =
+ theFontMetrics(pi_.base.bv->buffer().params().getFont());
+ int const length = fm.maxAscent() / 2;
+ Color col = change.color();
+
+ pi_.pain.line(int(x_) + 1, yo_ + 2, int(x_) + 1, yo_ + 2 - length, col,
+ Painter::line_solid, 3);
+
+ if (change.deleted()) {
+ pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1 + length,
+ yo_ + 2, col, Painter::line_solid, 3);
+ } else {
+ pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1,
+ yo_ + 2, col, Painter::line_solid, 3);
+ }
+ }
+
+ // draw an endlabel
+
+ switch (endlabel) {
+ case END_LABEL_BOX:
+ case END_LABEL_FILLED_BOX: {
+ FontInfo const font = labelFont();
+ FontMetrics const & fm = theFontMetrics(font);
+ int const size = int(0.75 * fm.maxAscent());
+ int const y = yo_ - size;
+ int const max_row_width = width_ - size - Inset::TEXT_TO_INSET_OFFSET;
+ int x = is_rtl ? nestMargin() + changebarMargin()
+ : max_row_width - text_metrics_.rightMargin(pm_);
+
+ // If needed, move the box a bit to avoid overlapping with text.
+ int const rem = max_row_width - row_.width();
+ if (rem <= 0)
+ x += is_rtl ? rem : - rem;
+
+ if (endlabel == END_LABEL_BOX)
+ pi_.pain.rectangle(x, y, size, size, Color_eolmarker);
+ else
+ pi_.pain.fillRectangle(x, y, size, size, Color_eolmarker);
+ break;
+ }
+
+ case END_LABEL_STATIC: {
+ FontInfo const font = labelFont();
+ FontMetrics const & fm = theFontMetrics(font);
+ docstring const & str = par_.layout().endlabelstring();
+ double const x = is_rtl ? x_ - fm.width(str) : x_;
+ pi_.pain.text(int(x), yo_, str, font);
+ break;
+ }
+
+ case END_LABEL_NO_LABEL:
+ if (lyxrc.paragraph_markers && size_type(pit_ + 1) < pars_.size()) {
+ docstring const s = docstring(1, char_type(0x00B6));
+ FontInfo f = FontInfo(text_.layoutFont(pit_));
+ f.setColor(Color_paragraphmarker);
+ pi_.pain.text(int(x_), yo_, s, f);
+ x_ += theFontMetrics(f).width(s);
+ }
+ break;
+ }
+}
+
+
+void RowPainter::paintOnlyInsets()
+{
+ CoordCache const & cache = pi_.base.bv->coordCache();
+ pos_type const end = row_.endpos();
+ for (pos_type pos = row_.pos(); pos != end; ++pos) {
+ // If outer row has changed, nested insets are repaint completely.
+ Inset const * inset = par_.getInset(pos);
+ bool const nested_inset = inset &&
+ ((inset->asInsetMath() &&
+ !inset->asInsetMath()->asMacroTemplate())
+ || inset->asInsetText()
+ || inset->asInsetTabular());
+ if (!nested_inset)
+ continue;
+ if (x_ > pi_.base.bv->workWidth()
+ || !cache.getInsets().has(inset))
+ continue;
+ x_ = cache.getInsets().x(inset);
+
+ bool const pi_selected = pi_.selected;
+ Cursor const & cur = pi_.base.bv->cursor();
+ if (cur.selection() && cur.text() == &text_
+ && cur.normalAnchor().text() == &text_)
+ pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
+ paintInset(inset, pos);
+ pi_.selected = pi_selected;
+ }
+}
+
+
+void RowPainter::paintText()
+{
+ //LYXERR0("-------------------------------------------------------");
+ pos_type const end = row_.endpos();
+ // Spaces at logical line breaks in bidi text must be skipped during
+ // painting. 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;
+ pos_type body_pos = par_.beginOfBody();
+ if (body_pos > 0 &&
+ (body_pos > end || !par_.isLineSeparator(body_pos - 1))) {
+ body_pos = 0;
+ }
+
+ Layout const & layout = par_.layout();
+
+ Change change_running;
+ int change_last_x = 0;
+
+ // check for possible inline completion
+ DocIterator const & inlineCompletionPos = pi_.base.bv->inlineCompletionPos();
+ pos_type inlineCompletionVPos = -1;
+ if (inlineCompletionPos.inTexted()
+ && inlineCompletionPos.text() == &text_
+ && inlineCompletionPos.pit() == pit_
+ && inlineCompletionPos.pos() - 1 >= row_.pos()
+ && inlineCompletionPos.pos() - 1 < row_.endpos()) {
+ // 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, don't paint it, unless
+ // it's in the last row of a paragraph; see skipped_sep_vpos declaration
+ if (end > 0 && end < par_.size() && par_.isSeparator(end - 1))
+ skipped_sep_vpos = bidi_.log2vis(end - 1);
+
+ for (pos_type vpos = row_.pos(); vpos < end; ) {
+ if (x_ > pi_.base.bv->workWidth())
+ break;
+
+ // Skip the separator at the logical end of the row
+ if (vpos == skipped_sep_vpos) {
+ ++vpos;
+ continue;
+ }
+
+ pos_type const pos = bidi_.vis2log(vpos);
+
+ if (pos >= par_.size()) {
+ ++vpos;
+ continue;
+ }
+
+ // Use font span to speed things up, see above
+ if (!font_span.inside(pos)) {
+ font_span = par_.fontSpan(pos);
+ font = text_metrics_.displayFont(pit_, pos);
+
+ // split font span if inline completion is inside
+ if (inlineCompletionVPos != -1
+ && font_span.inside(inlineCompletionPos.pos()))
+ font_span.last = inlineCompletionPos.pos();
+ }
+
+ // Note that this value will only be used in
+ // situations where no ligature of composition of
+ // characters is needed. (see comments in uses of width_pos).
+ const int width_pos = pm_.singleWidth(pos, font);
+
+ Change const & change = par_.lookupChange(pos);
+ if (change.changed() && !change_running.changed()) {
+ change_running = change;
+ change_last_x = int(x_);
+ }
+
+ Inset const * inset = par_.getInset(pos);
+ bool const highly_editable_inset = inset
+ && inset->editable();
+
+ // If we reach the end of a change or if the author changes, paint it.
+ // We also don't paint across things like tables
+ if (change_running.changed() && (highly_editable_inset
+ || !change.changed() || !change_running.isSimilarTo(change))) {
+ // Calculate 1/3 height of the buffer's default font
+ FontMetrics const & fm
+ = theFontMetrics(pi_.base.bv->buffer().params().getFont());
+ float const y_bar = change_running.deleted() ?
+ yo_ - fm.maxAscent() / 3 : yo_ + 2 * solid_line_offset_ + solid_line_thickness_;
+ pi_.pain.line(change_last_x, int(y_bar), int(x_), int(y_bar),
+ change_running.color(), Painter::line_solid, solid_line_thickness_);
+
+ // Change might continue with a different author or type
+ if (change.changed() && !highly_editable_inset) {
+ change_running = change;
+ change_last_x = int(x_);
+ } else
+ change_running.setUnchanged();
+ }
+
+ if (body_pos > 0 && pos == body_pos - 1) {
+ int const lwidth = theFontMetrics(labelFont())
+ .width(layout.labelsep);
+
+ // width_pos is either the width of a space or an inset
+ x_ += row_.label_hfill + lwidth - width_pos;
+ }
+
+ // Is the inline completion in front of character?
+ if (font.isRightToLeft() && vpos == inlineCompletionVPos)
+ paintInlineCompletion(font);
+
+ if (par_.isSeparator(pos)) {
+ Font const orig_font = text_metrics_.displayFont(pit_, pos);
+ double const orig_x = x_;
+ // width_pos is the width of a space
+ double separator_width = width_pos;
+ if (pos >= body_pos)
+ separator_width += row_.separator;
+ paintSeparator(orig_x, separator_width, orig_font.fontInfo());
+ paintForeignMark(orig_x, orig_font.language());
+ ++vpos;
+
+ } else if (inset) {
+ // If outer row has changed, nested insets are repaint completely.
+ pi_.base.bv->coordCache().insets().add(inset, int(x_), yo_);
+
+ bool const pi_selected = pi_.selected;
+ Cursor const & cur = pi_.base.bv->cursor();
+ if (cur.selection() && cur.text() == &text_
+ && cur.normalAnchor().text() == &text_)
+ pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
+ paintInset(inset, pos);
+ pi_.selected = pi_selected;
+ ++vpos;
+
+ } else {
+ // paint as many characters as possible.
+ paintFromPos(vpos, change_running.changed());
+ }
+
+ // Is the inline completion after character?
+ if (!font.isRightToLeft() && vpos - 1 == inlineCompletionVPos)
+ paintInlineCompletion(font);
+ }
+
+ // if we reach the end of a struck out range, paint it
+ if (change_running.changed()) {
+ FontMetrics const & fm
+ = theFontMetrics(pi_.base.bv->buffer().params().getFont());
+ float const y_bar = change_running.deleted() ?
+ yo_ - fm.maxAscent() / 3 : yo_ + 2 * solid_line_offset_ + solid_line_thickness_;
+ pi_.pain.line(change_last_x, int(y_bar), int(x_), int(y_bar),
+ change_running.color(), Painter::line_solid, solid_line_thickness_);
+ change_running.setUnchanged();
+ }
+}
+
+
+void RowPainter::paintSelection()
+{
+ if (!row_.selection())
+ return;
+ Cursor const & curs = pi_.base.bv->cursor();
+ 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 = text_metrics_.cursorX(beg.top(), begin_boundary);
+ int x2 = text_metrics_.cursorX(end.top(), end_boundary);
+ int const y1 = yo_ - row_.ascent();
+ int const y2 = y1 + row_.height();
+
+ int const rm = text_.isMainText() ? pi_.base.bv->rightMargin() : 0;
+ int const lm = text_.isMainText() ? pi_.base.bv->leftMargin() : 0;
+
+ // draw the margins
+ if (row_.begin_margin_sel) {
+ if (text_.isRTL(beg.paragraph())) {
+ pi_.pain.fillRectangle(int(xo_ + x1), y1,
+ text_metrics_.width() - rm - x1, y2 - y1, Color_selection);
+ } else {
+ pi_.pain.fillRectangle(int(xo_ + lm), y1, x1 - lm, y2 - y1,
+ Color_selection);
+ }
+ }
+
+ if (row_.end_margin_sel) {
+ if (text_.isRTL(beg.paragraph())) {
+ pi_.pain.fillRectangle(int(xo_ + lm), y1, x2 - lm, y2 - y1,
+ Color_selection);
+ } else {
+ pi_.pain.fillRectangle(int(xo_ + x2), y1, text_metrics_.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 (text_metrics_.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 = text_metrics_.cursorX(cur.top(), cur.boundary());
+ }
+
+ if (!(cur < end) || draw_now) {
+ x2 = text_metrics_.cursorX(cur.top(), cur.boundary());
+ pi_.pain.fillRectangle(int(xo_ + 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 RowPainter::paintInlineCompletion(Font const & font)
+{
+ docstring completion = pi_.base.bv->inlineCompletion();
+ FontInfo f = font.fontInfo();
+ bool rtl = font.isRightToLeft();
+
+ // draw the unique and the non-unique completion part
+ // Note: this is not time-critical as it is
+ // only done once per screen.
+ size_t uniqueTo = pi_.base.bv->inlineCompletionUniqueChars();
+ docstring s1 = completion.substr(0, uniqueTo);
+ docstring s2 = completion.substr(uniqueTo);
+ ColorCode c1 = Color_inlinecompletion;
+ ColorCode c2 = Color_nonunique_inlinecompletion;
+
+ // right to left?
+ if (rtl) {
+ swap(s1, s2);
+ swap(c1, c2);
+ }
+
+ if (!s1.empty()) {
+ f.setColor(c1);
+ pi_.pain.text(int(x_), yo_, s1, f);
+ x_ += theFontMetrics(font).width(s1);
+ }
+
+ if (!s2.empty()) {
+ f.setColor(c2);
+ pi_.pain.text(int(x_), yo_, s2, f);
+ x_ += theFontMetrics(font).width(s2);
+ }
+}
+
+} // namespace lyx