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275b7af75e
This method is a proxy for LyXRC::preview that forces to forward declare some wrapper around an enum... Instead, two simple static methods previewMath() and previewText() are introduced, that make the code much easier to follow.
167 lines
3.3 KiB
C++
167 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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setAutoBreakRows(true);
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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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