private IEnumerable <(bool success, string imgHtmlOrError, string originalHtml)> GenerateImages(
LaTeXTag tag,
MatchCollection matches)
{
List <(bool, string, string)> ret = new List <(bool, string, string)>();
foreach (Match match in matches)
{
string originalHtml = match.Groups[0].Value;
string latexCode = match.Groups[1].Value;
try
{
latexCode = LaTeXUtils.PlainText(latexCode);
var(success, imgHtmlOrError) = LaTeXUtils.GenerateDviFile(Config,
tag,
latexCode);
if (success == false)
{
ret.Add((false, imgHtmlOrError, originalHtml));
continue;
}
(success, imgHtmlOrError) = LaTeXUtils.GenerateImgFile(Config);
if (success && string.IsNullOrWhiteSpace(imgHtmlOrError))
{
ret.Add((false,
"An unknown error occured, make sure your TeX installation has all the required packages, "
+ "or set it to install missing packages on-the-fly",
originalHtml));
}
imgHtmlOrError = GenerateImgHtml(imgHtmlOrError,
tag.SurroundTexWith(latexCode));
ret.Add((success, imgHtmlOrError, originalHtml));
}
catch (Exception ex)
{
ret.Add((false, ex.Message, originalHtml));
}
}
return(ret);
}
public static (bool success, string pathOrError) GenerateDviFile(LaTeXCfg config,
LaTeXTag tag,
string latexContent)
{
if (File.Exists(LaTeXConst.Paths.TempTexFilePath))
{
File.Delete(LaTeXConst.Paths.TempTexFilePath);
}
if (File.Exists(LaTeXConst.Paths.TempDviFilePath))
{
File.Delete(LaTeXConst.Paths.TempDviFilePath);
}
latexContent = tag.LaTeXBegin + latexContent + tag.LaTeXEnd;
File.WriteAllText(LaTeXConst.Paths.TempTexFilePath,
latexContent);
var(success, output) = Execute(config.DviGenerationCmd, config.ExecutionTimeout);
return(success, success ? LaTeXConst.Paths.TempDviFilePath : output);
}
public static (bool success, string pathOrError) GenerateDviFile(LaTeXCfg config,
LaTeXTag tag,
string latexContent)
{
// Make sure to delete existing .tex, .dvi or .log file to start with a clean slate
if (File.Exists(LaTeXConst.Paths.TempTexFilePath))
{
File.Delete(LaTeXConst.Paths.TempTexFilePath);
}
if (File.Exists(LaTeXConst.Paths.TempDviFilePath))
{
File.Delete(LaTeXConst.Paths.TempDviFilePath);
}
if (File.Exists(LaTeXConst.Paths.TexErrorLog))
{
File.Delete(LaTeXConst.Paths.TexErrorLog);
}
// Build .tex file content and write it
latexContent = tag.LaTeXBegin + latexContent + tag.LaTeXEnd;
File.WriteAllText(LaTeXConst.Paths.TempTexFilePath, latexContent);
// Log for debugging purpose
LogTo.Verbose(
"Wrote TeX file {TempTexFilePath}:\r\n\r\n-------------------------------------------------\r\n{LatexContent}\r\n-------------------------------------------------\r\n",
LaTeXConst.Paths.TempTexFilePath, latexContent);
// Build the .dvi from the .tex file using dvi2png or another processor depending on user's config
var(success, output) = Execute(config.DviGenerationCmd, config.ExecutionTimeout);
// Log for debugging purpose
LogTeXLogs();
return(success, success ? LaTeXConst.Paths.TempDviFilePath : output);
}