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bdec44d614
As discussed on the devel list. See the subthread starting at http://www.mail-archive.com/lyx-devel@lists.lyx.org/msg187916.html Soon to be replaced with the same strategy adopted in the stable branch.
166 lines
3.3 KiB
C++
166 lines
3.3 KiB
C++
/**
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* \file InsetPreview.cpp
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author Vincent van Ravesteijn
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*
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* Full author contact details are available in file CREDITS.
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*/
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#include "config.h"
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#include "InsetPreview.h"
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#include "Buffer.h"
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#include "BufferParams.h"
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#include "BufferView.h"
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#include "Cursor.h"
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#include "Lexer.h"
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#include "MetricsInfo.h"
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#include "OutputParams.h"
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#include "RenderPreview.h"
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#include "frontends/Painter.h"
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#include "graphics/PreviewImage.h"
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#include <sstream>
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using namespace std;
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namespace lyx {
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InsetPreview::InsetPreview(Buffer * buf)
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: InsetText(buf),
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preview_(new RenderPreview(this)), use_preview_(true)
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{
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setDrawFrame(true);
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setFrameColor(Color_previewframe);
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}
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InsetPreview::~InsetPreview()
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{}
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InsetPreview::InsetPreview(InsetPreview const & other)
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: InsetText(other)
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{
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preview_.reset(new RenderPreview(*other.preview_, this));
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}
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void InsetPreview::write(ostream & os) const
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{
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os << "Preview" << "\n";
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text().write(os);
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}
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void InsetPreview::addPreview(DocIterator const & inset_pos,
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graphics::PreviewLoader &) const
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{
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preparePreview(inset_pos);
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}
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void InsetPreview::preparePreview(DocIterator const & pos) const
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{
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TexRow texrow;
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odocstringstream str;
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otexstream os(str, texrow);
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OutputParams runparams(&pos.buffer()->params().encoding());
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latex(os, runparams);
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docstring const snippet = str.str();
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preview_->addPreview(snippet, *pos.buffer());
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}
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bool InsetPreview::previewState(BufferView * bv) const
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{
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if (!editing(bv) && RenderPreview::previewText()) {
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graphics::PreviewImage const * pimage =
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preview_->getPreviewImage(bv->buffer());
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return pimage && pimage->image();
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}
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return false;
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}
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void InsetPreview::reloadPreview(DocIterator const & pos) const
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{
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preparePreview(pos);
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preview_->startLoading(*pos.buffer());
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}
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void InsetPreview::draw(PainterInfo & pi, int x, int y) const
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{
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use_preview_ = previewState(pi.base.bv);
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if (use_preview_) {
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// one pixel gap in front
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preview_->draw(pi, x + 1 + TEXT_TO_INSET_OFFSET, y);
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setPosCache(pi, x, y);
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return;
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}
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InsetText::draw(pi, x, y);
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}
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void InsetPreview::edit(Cursor & cur, bool front, EntryDirection entry_from)
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{
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cur.push(*this);
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InsetText::edit(cur, front, entry_from);
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}
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Inset * InsetPreview::editXY(Cursor & cur, int x, int y)
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{
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if (use_preview_) {
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edit(cur, true, ENTRY_DIRECTION_IGNORE);
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return this;
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}
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cur.push(*this);
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return InsetText::editXY(cur, x, y);
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}
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void InsetPreview::metrics(MetricsInfo & mi, Dimension & dim) const
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{
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if (previewState(mi.base.bv)) {
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preview_->metrics(mi, dim);
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mi.base.textwidth += 2 * TEXT_TO_INSET_OFFSET;
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dim.wid = max(dim.wid, 4);
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dim.asc = max(dim.asc, 4);
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dim.asc += TEXT_TO_INSET_OFFSET;
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dim.des += TEXT_TO_INSET_OFFSET;
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dim.wid += TEXT_TO_INSET_OFFSET;
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dim_ = dim;
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dim.wid += TEXT_TO_INSET_OFFSET;
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// insert a one pixel gap
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dim.wid += 1;
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// Cache the inset dimension.
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setDimCache(mi, dim);
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Dimension dim_dummy;
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MetricsInfo mi_dummy = mi;
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InsetText::metrics(mi_dummy, dim_dummy);
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return;
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}
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InsetText::metrics(mi, dim);
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}
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bool InsetPreview::notifyCursorLeaves(Cursor const & old, Cursor & cur)
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{
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reloadPreview(old);
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cur.screenUpdateFlags(Update::Force);
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return InsetText::notifyCursorLeaves(old, cur);
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}
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} // namespace lyx
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