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3502f5c999
This will be soon reused in InsetText to generate images for DocBook.
209 lines
4.4 KiB
C++
209 lines
4.4 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 "Dimension.h"
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#include "MetricsInfo.h"
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#include "RenderPreview.h"
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#include "texstream.h"
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#include "frontends/Painter.h"
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#include "graphics/PreviewImage.h"
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#include "mathed/InsetMathHull.h"
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#include "mathed/MacroTable.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), preview_(new RenderPreview(this))
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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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InsetPreview & InsetPreview::operator=(InsetPreview const & other)
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{
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if (&other == this)
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return *this;
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InsetText::operator=(other);
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preview_.reset(new RenderPreview(*other.preview_, this));
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return *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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MacroNameSet gatherMacroDefinitions(const Buffer* buffer, const Inset * inset)
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{
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// Collect macros for this inset.
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// Not done yet: this function returns a list of macro *definitions*.
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MacroNameSet macros;
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buffer->listMacroNames(macros);
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// Look for math insets and collect definitions for the used macros.
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MacroNameSet defs;
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DocIterator const dbeg = doc_iterator_begin(buffer, inset);
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DocIterator dit = dbeg;
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DocIterator const dend = doc_iterator_end(buffer, inset);
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if (!dit.nextInset())
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dit.forwardInset();
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for (; dit != dend; dit.forwardInset()) {
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InsetMath * im = dit.nextInset()->asInsetMath();
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InsetMathHull * hull = im ? im->asHullInset() : nullptr;
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if (!hull)
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continue;
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for (idx_type idx = 0; idx < hull->nargs(); ++idx)
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hull->usedMacros(hull->cell(idx), dbeg, macros, defs);
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}
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return defs;
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}
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docstring insetToLaTeXSnippet(const Buffer* buffer, const Inset * inset)
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{
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odocstringstream str;
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otexstream os(str);
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OutputParams runparams(&buffer->params().encoding());
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inset->latex(os, runparams);
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MacroNameSet defs = gatherMacroDefinitions(buffer, inset);
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docstring macro_preamble;
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for (const auto& def : defs)
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macro_preamble.append(def);
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return macro_preamble + str.str();
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}
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void InsetPreview::preparePreview(DocIterator const & pos) const
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{
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docstring const snippet = insetToLaTeXSnippet(pos.buffer(), this);
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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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if (previewState(pi.base.bv)) {
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// one pixel gap in front
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preview_->draw(pi, x + 1, y);
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} else
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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 (previewState(&cur.bv())) {
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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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dim.wid = max(dim.wid, 4);
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dim.asc = max(dim.asc, 4);
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dim.asc += topOffset(mi.base.bv);
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dim.des += bottomOffset(mi.base.bv);
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// insert a one pixel gap
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dim.wid += 1;
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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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