]> git.lyx.org Git - lyx.git/blobdiff - src/TextMetrics.cpp
avoid float-conversion warning and simplify size computation
[lyx.git] / src / TextMetrics.cpp
index 12a42e2d99d8e0517d82119112c921844dc4ef15..da9e404cb013813a1cd437f8165322426e13095b 100644 (file)
@@ -32,7 +32,7 @@
 #include "LyXRC.h"
 #include "MetricsInfo.h"
 #include "ParagraphParameters.h"
-#include "rowpainter.h"
+#include "RowPainter.h"
 #include "Text.h"
 #include "TextClass.h"
 #include "VSpace.h"
@@ -290,7 +290,7 @@ Font TextMetrics::displayFont(pit_type pit, pos_type pos) const
 
 bool TextMetrics::isRTL(CursorSlice const & sl, bool boundary) const
 {
-       if (!lyxrc.rtl_support || !sl.text())
+       if (!sl.text())
                return false;
 
        int correction = 0;
@@ -304,7 +304,7 @@ bool TextMetrics::isRTL(CursorSlice const & sl, bool boundary) const
 bool TextMetrics::isRTLBoundary(pit_type pit, pos_type pos) const
 {
        // no RTL boundary at paragraph start
-       if (!lyxrc.rtl_support || pos == 0)
+       if (pos == 0)
                return false;
 
        Font const & left_font = displayFont(pit, pos - 1);
@@ -319,9 +319,8 @@ bool TextMetrics::isRTLBoundary(pit_type pit, pos_type pos) const
 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 (// 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))
@@ -346,6 +345,7 @@ bool TextMetrics::isRTLBoundary(pit_type pit, pos_type pos,
        // 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;
@@ -385,7 +385,7 @@ bool TextMetrics::redoParagraph(pit_type const pit)
                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(ATOMIC_UNDO, pit, pit);
+                       cur.recordUndo(pit, pit);
 
                int const moveCursor = par.fixBiblio(buffer);
 
@@ -446,7 +446,7 @@ bool TextMetrics::redoParagraph(pit_type const pit)
                MacroContext mc(&buffer, parPos);
                MetricsInfo mi(bv_, font.fontInfo(), w, mc);
                ii->inset->metrics(mi, dim);
-               Dimension const old_dim = pm.insetDimension(ii->inset);
+               Dimension const old_dim = pm.insetDimension(ii->inset);
                if (old_dim != dim) {
                        pm.setInsetDimension(ii->inset, dim);
                        changed = true;
@@ -506,11 +506,11 @@ bool TextMetrics::redoParagraph(pit_type const pit)
 }
 
 
-int TextMetrics::getAlign(Paragraph const & par, pos_type const pos) const
+LyXAlignment TextMetrics::getAlign(Paragraph const & par, pos_type const pos) const
 {
        Layout const & layout = par.layout();
 
-       int align;
+       LyXAlignment align;
        if (par.params().align() == LYX_ALIGN_LAYOUT)
                align = layout.align;
        else
@@ -565,15 +565,15 @@ void TextMetrics::computeRowMetrics(pit_type const pit,
 
        Paragraph const & par = text_->getPar(pit);
 
-       double w = width - row.right_margin - row.width();
+       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, /**/);
 
        bool const is_rtl = text_->isRTL(par);
        if (is_rtl)
-               row.x = rightMargin(pit);
+               row.left_margin = rightMargin(pit);
        else
-               row.x = leftMargin(max_width_, pit, row.pos());
+               row.left_margin = leftMargin(max_width_, pit, row.pos());
 
        // is there a manual margin with a manual label
        Layout const & layout = par.layout();
@@ -600,69 +600,58 @@ void TextMetrics::computeRowMetrics(pit_type const pit,
        // are there any hfills in the row?
        if (int const nh = numberOfHfills(row, par.beginOfBody())) {
                if (w > 0)
-                       hfill = w / double(nh);
+                       hfill = double(w) / nh;
        // we don't have to look at the alignment if it is ALIGN_LEFT and
        // if the row is already larger then the permitted width as then
        // we force the LEFT_ALIGN'edness!
        } else if (int(row.width()) < max_width_) {
                // is it block, flushleft or flushright?
                // set x how you need it
-               int const align = getAlign(par, row.pos());
-
-               switch (align) {
+               switch (getAlign(par, row.pos())) {
                case LYX_ALIGN_BLOCK: {
                        int const ns = numberOfSeparators(row);
                        /** If we have separators, and this row has
                         * not be broken abruptly by a display inset
                         * or newline, then stretch it */
-                       if (ns && !row.right_boundary() 
+                       if (ns && !row.right_boundary()
                            && row.endpos() != par.size()) {
-                               setSeparatorWidth(row, w / ns);
+                               setSeparatorWidth(row, double(w) / ns);
                                row.dimension().wid = width;
                        } else if (is_rtl) {
                                row.dimension().wid = width;
-                               row.x += w;
+                               row.left_margin += w;
                        }
                        break;
                }
                case LYX_ALIGN_RIGHT:
-                       row.x += w;
+                       row.left_margin += w;
                        break;
                case LYX_ALIGN_CENTER:
                        row.dimension().wid = width - w / 2;
-                       row.x += 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;
                }
        }
 
-#if 0
-       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;
-               }
-       }
-#endif
-
+       // Finally,  handle 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;
-
        ParagraphMetrics & pm = par_metrics_[pit];
        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 -= row.label_hfill * (nlh - 1);
+                       cit->dim.wid -= int(row.label_hfill * (nlh - 1));
                if (!cit->inset || !cit->inset->isHfill())
                        continue;
                if (pm.hfillExpansion(row, cit->pos))
@@ -680,7 +669,7 @@ void TextMetrics::computeRowMetrics(pit_type const pit,
 int TextMetrics::labelFill(pit_type const pit, Row const & row) const
 {
        Paragraph const & par = text_->getPar(pit);
-       LBUFERR(par.beginOfBody() > 0);
+       LBUFERR(par.beginOfBody() > 0 || par.isEnvSeparator(0));
 
        int w = 0;
        Row::const_iterator cit = row.begin();
@@ -688,7 +677,7 @@ int TextMetrics::labelFill(pit_type const pit, Row const & row) const
        // iterate over elements before main body (except the last one,
        // which is extra space).
        while (cit!= end && cit->endpos < par.beginOfBody()) {
-               w += cit->width();
+               w += cit->dim.wid;
                ++cit;
        }
 
@@ -788,7 +777,7 @@ private:
 
 /** 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::shorten_if_needed
+ * intelligence is also in Row::shortenIfNeeded.
  */
 void TextMetrics::breakRow(Row & row, int const right_margin, pit_type const pit) const
 {
@@ -798,12 +787,12 @@ void TextMetrics::breakRow(Row & row, int const right_margin, pit_type const pit
        int const width = max_width_ - right_margin;
        pos_type const body_pos = par.beginOfBody();
        row.clear();
-       row.x = leftMargin(max_width_, pit, pos);
-       row.dimension().wid = row.x;
+       // This make get changed in computeRowMetrics depending on RTL
+       row.left_margin = leftMargin(max_width_, pit, pos);
+       row.dimension().wid = row.left_margin;
        row.right_margin = right_margin;
 
        if (pos >= end || row.width() > width) {
-               row.dimension().wid += right_margin;
                row.endpos(end);
                return;
        }
@@ -846,6 +835,8 @@ void TextMetrics::breakRow(Row & row, int const right_margin, pit_type const pit
                        // 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(pit) - row.width());
                        row.addSpace(i, add, *fi, par.lookupChange(i));
@@ -876,7 +867,7 @@ void TextMetrics::breakRow(Row & row, int const right_margin, pit_type const pit
                // - Before a display inset
                // - After a display inset
                Inset const * inset = 0;
-               if (par.isNewline(i)
+               if (par.isNewline(i) || par.isEnvSeparator(i)
                    || (i + 1 < end && (inset = par.getInset(i + 1))
                        && inset->display())
                    || (!row.empty() && row.back().inset
@@ -889,6 +880,8 @@ void TextMetrics::breakRow(Row & row, int const right_margin, pit_type const pit
                ++i;
                ++fi;
        }
+       row.finalizeLast();
+       row.endpos(i);
 
        // End of paragraph marker
        if (lyxrc.paragraph_markers
@@ -904,16 +897,8 @@ void TextMetrics::breakRow(Row & row, int const right_margin, pit_type const pit
                row.addVirtual(end, docstring(1, char_type(0x00B6)), f, Change());
        }
 
-       row.finalizeLast();
-       row.endpos(i);
        // if the row is too large, try to cut at last separator.
-       row.shorten_if_needed(body_pos, width);
-
-       // if the row ends with a separator that is not at end of
-       // paragraph, remove it
-       if (!row.empty() && row.back().type == Row::SEPARATOR
-           && row.endpos() < par.size())
-               row.pop_back();
+       row.shortenIfNeeded(body_pos, width);
 
        // make sure that the RTL elements are in reverse ordering
        row.reverseRTL(text_->isRTL(par));
@@ -1111,29 +1096,29 @@ pos_type TextMetrics::getPosNearX(Row const & row, int & x,
        pos_type pos = row.pos();
        boundary = false;
        if (row.empty())
-               x = row.x;
-       else if (x <= row.x) {
+               x = row.left_margin;
+       else if (x <= row.left_margin) {
                pos = row.front().left_pos();
-               x = row.x;
-       } else if (x >= row.width() - row.right_margin) {
+               x = row.left_margin;
+       } else if (x >= row.width()) {
                pos = row.back().right_pos();
-               x = row.width() - row.right_margin;
+               x = row.width();
        } else {
-               double w = row.x;
+               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->width() > x) {
-                               double x_offset = x - w;
+                       if (w <= x &&  w + cit->full_width() > x) {
+                               int x_offset = int(x - w);
                                pos = cit->x2pos(x_offset);
-                               x = x_offset + w;
+                               x = int(x_offset + w);
                                break;
                        }
-                       w += cit->width();
+                       w += cit->full_width();
                }
                if (cit == row.end()) {
                        pos = row.back().right_pos();
-                       x = row.width() - row.right_margin;
+                       x = row.width();
                }
                /** This tests for the case where the cursor is placed
                 * just before a font direction change. See comment on
@@ -1147,12 +1132,14 @@ pos_type TextMetrics::getPosNearX(Row const & row, int & x,
        }
 
        /** This tests for the case where the cursor is set at the end
-        * of a row which has been broken due to a display inset on
-        * next row. This is indicated by Row::right_boundary.
+        * 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())
-               boundary = row.right_boundary();
+               boundary = true;
 
        x += xo;
        return pos;
@@ -1476,10 +1463,10 @@ int TextMetrics::cursorX(CursorSlice const & sl,
        if (row.empty()
            || (pos == row.begin()->left_pos()
                && pos != row.begin()->right_pos()))
-               return int(row.x);
+               return row.left_margin;
 
        Row::const_iterator cit = row.begin();
-       double x = row.x;
+       double x = row.left_margin;
        for ( ; cit != row.end() ; ++cit) {
                /** Look whether the cursor is inside the element's
                 * span. Note that it is necessary to take the
@@ -1492,7 +1479,7 @@ int TextMetrics::cursorX(CursorSlice const & sl,
                                x += cit->pos2x(pos);
                                break;
                }
-               x += cit->width();
+               x += cit->full_width();
        }
 
        return int(x);
@@ -1547,7 +1534,8 @@ bool TextMetrics::cursorEnd(Cursor & cur)
        bool boundary = false;
        if (end != cur.lastpos()) {
                if (!cur.paragraph().isLineSeparator(end-1)
-                   && !cur.paragraph().isNewline(end-1))
+                   && !cur.paragraph().isNewline(end-1)
+                   && !cur.paragraph().isEnvSeparator(end-1))
                        boundary = true;
                else
                        --end;
@@ -1622,15 +1610,21 @@ int TextMetrics::leftMargin(int max_width,
        l_margin += theFontMetrics(buffer.params().getFont()).signedWidth(
                tclass.leftmargin());
 
-       if (par.getDepth() != 0) {
+       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()) {
-                               l_margin = leftMargin(max_width, newpar);
+                               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()) {
+                               if (pars[newpar].empty() &&
+                                   buffer.params().paragraph_separation ==
+                                   BufferParams::ParagraphIndentSeparation) {
                                        docstring pi = pars[newpar].layout().parindent;
                                        l_margin -= theFontMetrics(
                                                buffer.params().getFont()).signedWidth(pi);
@@ -1648,10 +1642,16 @@ int TextMetrics::leftMargin(int max_width,
 
        // This happens after sections or environments in standard classes.
        // We have to check the previous layout at same depth.
-       if (tclass.isDefaultLayout(par.layout()) && pit > 0
-           && pars[pit - 1].getDepth() >= par.getDepth()) {
+       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 (pars[prev < pit ? prev : pit - 1].layout().nextnoindent)
+               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();
        }
 
@@ -1734,7 +1734,7 @@ int TextMetrics::leftMargin(int max_width,
        }
 
        if (!par.params().leftIndent().zero())
-               l_margin += par.params().leftIndent().inPixels(max_width);
+               l_margin += par.params().leftIndent().inPixels(max_width, labelfont_metrics.em());
 
        LyXAlignment align;
 
@@ -1801,7 +1801,7 @@ void TextMetrics::draw(PainterInfo & pi, int x, int y) const
 }
 
 
-void TextMetrics::drawParagraph(PainterInfo & pi, pit_type pit, int x, int y) const
+void TextMetrics::drawParagraph(PainterInfo & pi, pit_type const pit, int const x, int y) const
 {
        BufferParams const & bparams = bv_->buffer().params();
        ParagraphMetrics const & pm = par_metrics_[pit];
@@ -1841,14 +1841,25 @@ void TextMetrics::drawParagraph(PainterInfo & pi, pit_type pit, int x, int y) co
        for (size_t i = 0; i != nrows; ++i) {
 
                Row const & row = pm.rows()[i];
+               int row_x = x;
                if (i)
                        y += row.ascent();
 
+               CursorSlice rowSlice(const_cast<InsetText &>(text_->inset()));
+               rowSlice.pit() = pit;
+               rowSlice.pos() = row.pos();
+
                bool const inside = (y + row.descent() >= 0
                        && y - row.ascent() < ww);
+
+               // Adapt to cursor row scroll offset if applicable.
+               if (bv_->currentRowSlice() == rowSlice)
+                       row_x -= bv_->horizScrollOffset();
+
                // 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, x, y);
+
+               RowPainter rp(pi, *text_, pit, row, row_x, y);
 
                if (selection)
                        row.setSelectionAndMargins(sel_beg_par, sel_end_par);
@@ -1865,11 +1876,13 @@ void TextMetrics::drawParagraph(PainterInfo & pi, pit_type pit, int x, int y) co
                }
 
                // Row signature; has row changed since last paint?
-               row.setCrc(pm.computeRowSignature(row, bparams));
-               bool row_has_changed = row.changed();
+               if (pi.pain.isDrawingEnabled())
+                       row.setCrc(pm.computeRowSignature(row, bparams));
+               bool row_has_changed = row.changed()
+                       || rowSlice == bv_->lastRowSlice();
 
                // Take this opportunity to spellcheck the row contents.
-               if (row_has_changed && lyxrc.spellcheck_continuously) {
+               if (row_has_changed && pi.do_spellcheck && lyxrc.spellcheck_continuously) {
                        text_->getPar(pit).spellCheck();
                }
 
@@ -1886,7 +1899,10 @@ void TextMetrics::drawParagraph(PainterInfo & pi, pit_type pit, int x, int y) co
                // 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(),
+                       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);
                }
 
@@ -1899,7 +1915,8 @@ void TextMetrics::drawParagraph(PainterInfo & pi, pit_type pit, int x, int y) co
                        LYXERR(Debug::PAINTING, foreword << "pit=" << pit << " row=" << i
                                << " row_selection="    << row.selection()
                                << " full_repaint="     << pi.full_repaint
-                               << " row_has_changed="  << row_has_changed);
+                               << " row_has_changed="  << row_has_changed
+                               << " drawingEnabled=" << pi.pain.isDrawingEnabled());
                }
 
                // Backup full_repaint status and force full repaint
@@ -1921,6 +1938,8 @@ void TextMetrics::drawParagraph(PainterInfo & pi, pit_type pit, int x, int y) co
                        rp.paintLast();
                if (i == 0 && is_rtl)
                        rp.paintFirst();
+               rp.paintTooLargeMarks(row_x < 0,
+                                     row_x + row.width() > bv_->workWidth());
                y += row.descent();
 
                // Restore full_repaint status.