lyx_mirror/src/insets/RenderGraphic.cpp

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/**
* \file RenderGraphic.cpp
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author Angus Leeming
*
* Full author contact details are available in file CREDITS.
*/
#include <config.h>
#include "RenderGraphic.h"
#include "insets/Inset.h"
#include "support/FileName.h"
#include "support/filetools.h"
#include "support/gettext.h"
#include "LyX.h"
#include "LyXRC.h"
#include "MetricsInfo.h"
#include "frontends/FontMetrics.h"
#include "frontends/Painter.h"
#include "graphics/GraphicsImage.h"
#include "support/filetools.h"
#include <boost/bind.hpp>
using namespace std;
namespace lyx {
RenderGraphic::RenderGraphic(Inset const * inset)
{
loader_.connect(boost::bind(&Inset::updateFrontend, inset));
}
RenderGraphic::RenderGraphic(RenderGraphic const & other, Inset const * inset)
: RenderBase(other), loader_(other.loader_), params_(other.params_)
{
loader_.connect(boost::bind(&Inset::updateFrontend, inset));
}
RenderBase * RenderGraphic::clone(Inset const * inset) const
{
return new RenderGraphic(*this, inset);
}
void RenderGraphic::update(graphics::Params const & params)
{
params_ = params;
if (!params_.filename.empty())
loader_.reset(params_.filename, params_);
}
namespace {
bool displayGraphic(graphics::Params const & params)
{
return params.display != graphics::NoDisplay &&
lyxrc.display_graphics != graphics::NoDisplay;
}
docstring const statusMessage(graphics::Params const & params,
graphics::ImageStatus status)
{
docstring ret;
if (!displayGraphic(params))
ret = _("Not shown.");
else {
switch (status) {
case graphics::WaitingToLoad:
ret = _("Not shown.");
break;
case graphics::Loading:
ret = _("Loading...");
break;
case graphics::Converting:
ret = _("Converting to loadable format...");
break;
case graphics::Loaded:
ret = _("Loaded into memory. Generating pixmap...");
break;
case graphics::ScalingEtc:
ret = _("Scaling etc...");
break;
case graphics::Ready:
ret = _("Ready to display");
break;
case graphics::ErrorNoFile:
ret = _("No file found!");
break;
case graphics::ErrorConverting:
ret = _("Error converting to loadable format");
break;
case graphics::ErrorLoading:
ret = _("Error loading file into memory");
break;
case graphics::ErrorGeneratingPixmap:
ret = _("Error generating the pixmap");
break;
case graphics::ErrorUnknown:
ret = _("No image");
break;
}
}
return ret;
}
bool readyToDisplay(graphics::Loader const & loader)
{
if (!loader.image() || loader.status() != graphics::Ready)
return false;
return loader.image()->isDrawable();
}
} // namespace anon
void RenderGraphic::metrics(MetricsInfo & mi, Dimension & dim) const
{
bool image_ready = displayGraphic(params_) && readyToDisplay(loader_);
dim.asc = image_ready ? loader_.image()->height() : 50;
dim.des = 0;
if (image_ready) {
dim.wid = loader_.image()->width() + 2 * Inset::TEXT_TO_INSET_OFFSET;
} else {
int font_width = 0;
FontInfo msgFont(mi.base.font);
msgFont.setFamily(SANS_FAMILY);
// FIXME UNICODE
docstring const justname = from_utf8(params_.filename.onlyFileName());
if (!justname.empty()) {
msgFont.setSize(FONT_SIZE_FOOTNOTE);
font_width = theFontMetrics(msgFont).width(justname);
}
docstring const msg = statusMessage(params_, loader_.status());
if (!msg.empty()) {
msgFont.setSize(FONT_SIZE_TINY);
font_width = max(font_width,
theFontMetrics(msgFont).width(msg));
}
dim.wid = max(50, font_width + 15);
}
dim_ = dim;
}
void RenderGraphic::draw(PainterInfo & pi, int x, int y) const
{
if (displayGraphic(params_)) {
if (loader_.status() == graphics::WaitingToLoad)
loader_.startLoading();
if (!loader_.monitoring())
loader_.startMonitoring();
}
// This will draw the graphics. If the graphics has not been
// loaded yet, we draw just a rectangle.
if (displayGraphic(params_) && readyToDisplay(loader_)) {
pi.pain.image(x + Inset::TEXT_TO_INSET_OFFSET,
y - dim_.asc,
dim_.wid - 2 * Inset::TEXT_TO_INSET_OFFSET,
dim_.asc + dim_.des,
*loader_.image());
} else {
pi.pain.rectangle(x + Inset::TEXT_TO_INSET_OFFSET,
y - dim_.asc,
dim_.wid - 2 * Inset::TEXT_TO_INSET_OFFSET,
dim_.asc + dim_.des,
Color_foreground);
// Print the file name.
FontInfo msgFont = pi.base.font;
msgFont.setFamily(SANS_FAMILY);
string const justname = params_.filename.onlyFileName();
if (!justname.empty()) {
msgFont.setSize(FONT_SIZE_FOOTNOTE);
pi.pain.text(x + Inset::TEXT_TO_INSET_OFFSET + 6,
y - theFontMetrics(msgFont).maxAscent() - 4,
from_utf8(justname), msgFont);
}
// Print the message.
docstring const msg = statusMessage(params_, loader_.status());
if (!msg.empty()) {
msgFont.setSize(FONT_SIZE_TINY);
pi.pain.text(x + Inset::TEXT_TO_INSET_OFFSET + 6,
y - 4, msg, msgFont);
}
}
}
} // namespace lyx