2003-10-10 21:08:55 +00:00
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/**
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* \file render_preview.C
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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 Angus Leeming
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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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2003-10-22 22:26:47 +00:00
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#include "insets/render_preview.h"
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#include "insets/inset.h"
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2003-10-10 21:08:55 +00:00
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2003-10-22 22:26:47 +00:00
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#include "BufferView.h"
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#include "debug.h"
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#include "dimension.h"
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#include "gettext.h"
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#include "LColor.h"
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#include "lyx_main.h"
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2004-04-19 13:31:17 +00:00
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#include "lyxrc.h"
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#include "metricsinfo.h"
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#include "frontends/font_metrics.h"
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#include "frontends/Painter.h"
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#include "graphics/PreviewImage.h"
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#include "graphics/PreviewLoader.h"
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#include "graphics/Previews.h"
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#include "support/lstrings.h"
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#include <boost/bind.hpp>
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using std::string;
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2003-11-03 17:47:28 +00:00
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using std::auto_ptr;
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2003-10-10 21:08:55 +00:00
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namespace graphics = lyx::graphics;
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namespace support = lyx::support;
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LyXRC_PreviewStatus RenderPreview::status()
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{
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return graphics::Previews::status();
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2003-10-10 21:08:55 +00:00
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}
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2004-04-13 17:25:23 +00:00
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RenderPreview::RenderPreview(InsetBase const * inset)
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: parent_(inset)
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{}
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RenderPreview::RenderPreview(RenderPreview const & other,
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InsetBase const * inset)
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: RenderBase(other),
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boost::signals::trackable(),
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snippet_(other.snippet_),
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parent_(inset)
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{}
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auto_ptr<RenderBase> RenderPreview::clone(InsetBase const * inset) const
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{
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return auto_ptr<RenderBase>(new RenderPreview(*this, inset));
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}
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2003-10-22 22:26:47 +00:00
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namespace {
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string const statusMessage(BufferView const * bv, string const & snippet)
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{
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BOOST_ASSERT(bv && bv->buffer());
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Buffer const & buffer = *bv->buffer();
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graphics::Previews const & previews = graphics::Previews::get();
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graphics::PreviewLoader const & loader = previews.loader(buffer);
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graphics::PreviewLoader::Status const status = loader.status(snippet);
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string message;
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switch (status) {
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case graphics::PreviewLoader::InQueue:
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case graphics::PreviewLoader::Processing:
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message = _("Preview loading");
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break;
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case graphics::PreviewLoader::Ready:
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message = _("Preview ready");
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break;
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case graphics::PreviewLoader::NotFound:
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message = _("Preview failed");
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break;
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}
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return message;
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}
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} // namespace anon
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graphics::PreviewImage const *
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RenderPreview::getPreviewImage(Buffer const & buffer) const
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{
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graphics::Previews & previews = graphics::Previews::get();
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graphics::PreviewLoader & loader = previews.loader(buffer);
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return loader.preview(snippet_);
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}
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void RenderPreview::metrics(MetricsInfo & mi, Dimension & dim) const
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{
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BOOST_ASSERT(mi.base.bv && mi.base.bv->buffer());
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graphics::PreviewImage const * const pimage =
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getPreviewImage(*mi.base.bv->buffer());
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if (pimage) {
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dim.asc = pimage->ascent();
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dim.des = pimage->descent();
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dim.wid = pimage->width();
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} else {
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dim.asc = 50;
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dim.des = 0;
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LyXFont font(mi.base.font);
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font.setFamily(LyXFont::SANS_FAMILY);
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font.setSize(LyXFont::SIZE_FOOTNOTE);
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dim.wid = 15 +
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font_metrics::width(statusMessage(mi.base.bv, snippet_),
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font);
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}
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dim_ = dim;
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}
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void RenderPreview::draw(PainterInfo & pi, int x, int y) const
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{
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BOOST_ASSERT(pi.base.bv && pi.base.bv->buffer());
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graphics::PreviewImage const * const pimage =
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getPreviewImage(*pi.base.bv->buffer());
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if (pimage && pimage->image()) {
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pi.pain.image(x, y - dim_.asc, dim_.wid, dim_.height(),
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*(pimage->image()));
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return;
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}
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pi.pain.rectangle(x + InsetOld::TEXT_TO_INSET_OFFSET,
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y - dim_.asc,
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dim_.wid - 2 * InsetOld::TEXT_TO_INSET_OFFSET,
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dim_.asc + dim_.des,
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LColor::foreground);
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LyXFont font(pi.base.font);
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font.setFamily(LyXFont::SANS_FAMILY);
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font.setSize(LyXFont::SIZE_FOOTNOTE);
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pi.pain.text(x + InsetOld::TEXT_TO_INSET_OFFSET + 6,
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y - font_metrics::maxAscent(font) - 4,
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statusMessage(pi.base.bv, snippet_), font);
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}
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void RenderPreview::startLoading(Buffer const & buffer) const
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{
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if (status() == LyXRC::PREVIEW_OFF || snippet_.empty())
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return;
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graphics::Previews & previews = graphics::Previews::get();
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graphics::PreviewLoader & loader = previews.loader(buffer);
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loader.startLoading();
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lyxerr << "RenderPreview::startLoading: " << snippet_ << std::endl;
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}
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void RenderPreview::addPreview(string const & latex_snippet,
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Buffer const & buffer)
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{
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if (status() == LyXRC::PREVIEW_OFF)
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return;
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graphics::Previews & previews = graphics::Previews::get();
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graphics::PreviewLoader & loader = previews.loader(buffer);
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addPreview(latex_snippet, loader);
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}
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void RenderPreview::addPreview(string const & latex_snippet,
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graphics::PreviewLoader & ploader)
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{
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if (status() == LyXRC::PREVIEW_OFF)
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return;
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snippet_ = support::trim(latex_snippet);
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if (snippet_.empty())
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return;
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if (ploader.preview(snippet_))
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return;
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// If this is the first time of calling, connect to the
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// PreviewLoader signal that'll inform us when the preview image
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// is ready for loading.
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if (!ploader_connection_.connected()) {
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ploader_connection_ = ploader.connect(
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boost::bind(&RenderPreview::imageReady, this, _1));
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}
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ploader.add(snippet_);
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}
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void RenderPreview::removePreview(Buffer const & buffer)
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{
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if (snippet_.empty())
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return;
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graphics::Previews & previews = graphics::Previews::get();
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graphics::PreviewLoader & loader = previews.loader(buffer);
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loader.remove(snippet_);
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snippet_.erase();
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}
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void RenderPreview::imageReady(graphics::PreviewImage const & pimage)
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{
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// Check the current snippet is the same as that previewed.
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if (snippet_ == pimage.snippet())
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LyX::cref().updateInset(parent_);
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}
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2004-04-13 17:25:23 +00:00
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RenderMonitoredPreview::RenderMonitoredPreview(InsetBase const * inset)
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: RenderPreview(inset),
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monitor_(std::string(), 2000)
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{}
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void RenderMonitoredPreview::setAbsFile(string const & file)
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{
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monitor_.reset(file);
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}
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void RenderMonitoredPreview::draw(PainterInfo & pi, int x, int y) const
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{
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RenderPreview::draw(pi, x, y);
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if (!monitoring())
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startMonitoring();
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}
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boost::signals::connection
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RenderMonitoredPreview::fileChanged(slot_type const & slot)
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{
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return monitor_.connect(slot);
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}
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