// determines the icon data; this could be either a path on disk (if we have
// a suitable icon locally), base64-encoded icon data (if the icon is embedded
// in an R package), or nothing (if we cannot determine an icon at all)
std::string iconData(const std::string& iconGroup,
const std::string& iconName,
const std::string& iconPath)
{
if (iconPath.empty())
{
// convert the icon name into the format of our shipped icons, which is
// all lowercase with no whitespace (e.g. "SQL Server" => "sqlserver.png")
std::string iconFilename(string_utils::toLower(iconName));
iconFilename = boost::regex_replace(iconFilename,
boost::regex("\\s"), "") + ".png";
// the package did not supply an icon; see if there's one baked in
FilePath path = options().rResourcesPath().childPath("connections")
.childPath(iconGroup)
.childPath(iconFilename);
if (path.exists())
return std::string("connections/") + iconGroup + "/" + iconFilename;
if (iconGroup == "drivers")
return std::string("connections/drivers/odbc.png");
// didn't find anything
return std::string();
}
// expand the path
FilePath icon = module_context::resolveAliasedPath(iconPath);
std::string iconData;
// ensure that the icon file exists and is a small GIF, JPG, or PNG image
if (icon.exists() && icon.size() < kMaxIconSize &&
(icon.hasExtensionLowerCase(".gif") ||
icon.hasExtensionLowerCase(".png") ||
icon.hasExtensionLowerCase(".jpg") ||
icon.hasExtensionLowerCase(".jpeg")))
{
Error error = base64::encode(icon, &iconData);
if (error)
LOG_ERROR(error);
else
{
iconData = "data:" + icon.mimeContentType("image/png") +
";base64," + iconData;
}
}
return iconData;
}
File APP::iconFile() { return homeDir().getChildFile (iconsPath() + iconFilename() ) ; }
File APP::logoFile() { return binFile().getSiblingFile(iconFilename()) ; }
