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Paul Schneider 2019-01-01 16:28:47 +00:00
commit ccc91bbf19
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Yavsc/Helpers/TeXHelpers.cs
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using System;
using System.Diagnostics;
using System.IO;
using System.Linq;
using Microsoft.AspNet.Http;
using Microsoft.AspNet.Mvc;
using Microsoft.AspNet.Mvc.Rendering;
using Microsoft.AspNet.Mvc.ViewEngines;
namespace Yavsc.Helpers
{
using ViewModels.Gen;
public class TeXString : HtmlString
{
public TeXString(TeXString teXString): base(teXString.ToString())
{
}
public TeXString(string str) : base(str)
{
}
public static TeXString operator+ (TeXString a, TeXString b) {
return new TeXString(a.ToString()+b.ToString());
}
}
public class Replacement
{
string target;
string replacement;
public Replacement(string target, string replacement)
{
this.target = target;
this.replacement = replacement;
}
public string Execute(string source)
{
return source?.Replace(target, replacement) ?? null;
}
}
public static class TeXHelpers
{
public static readonly Replacement[] SpecialCharsDefaultRendering =
{
new Replacement("<","\\textless"),
new Replacement(">","\\textgreater"),
new Replacement("©","\\copyright"),
new Replacement("®","\\textregistered"),
new Replacement("\\","\\textbackslash"),
new Replacement("™","\\texttrademark"),
new Replacement("¶","\\P"),
new Replacement("|","\\textbar"),
new Replacement("%","\\%"),
new Replacement("{","\\{"),
new Replacement("}","\\}"),
new Replacement("_","\\_"),
new Replacement("#","\\#"),
new Replacement("$","\\$"),
new Replacement("_","\\_"),
new Replacement("¿","\\textquestiondown"),
new Replacement("§","\\S"),
new Replacement("£","\\pounds"),
new Replacement("&","\\&"),
new Replacement("¡","\\textexclamdown"),
new Replacement("†","\\dag"),
new Replacement("–","\\textendash"),
new Replacement("°","\\textdegree")
};
public static TeXString ToTeX(this string source, string defaultValue="\\textit{néant}")
{
if (source==null) return new TeXString(defaultValue);
string result=source;
foreach (var r in SpecialCharsDefaultRendering)
{
result = r.Execute(result);
}
return new TeXString(result);
}
public static TeXString ToTeXCell(this string source, string defaultValue="\\textit{néant}")
{
if (source==null) return new TeXString(defaultValue);
string result=source;
foreach (var r in SpecialCharsDefaultRendering)
{
result = r.Execute(result);
}
result = result.Replace("\n","\\tabularnewline ");
return new TeXString(result);
}
public static string NewLinesWith(this string target, string separator)
{
var items = target.Split(new char[] { '\n' }).Where(
s => !string.IsNullOrWhiteSpace(s));
return string.Join(separator, items);
}
public static TeXString ToTeXLines(this string source, string defaultValue, string lineSeparator = "\n\\\\")
{
if (source == null) return new TeXString(defaultValue);
return new TeXString( source.ToTeX().ToString().NewLinesWith(lineSeparator) );
}
public static TeXString SplitAddressToTeX (this string source, string lineSeparator = "\n\\\\", string defaultValue = "\\textit{pas d'adresse postale}")
{
if (string.IsNullOrWhiteSpace(source)) return new TeXString(defaultValue);
var alines = source.Split(',');
var texlines = alines.Select(l=>l.ToTeX().ToString());
return new TeXString(string.Join(lineSeparator,texlines));
}
public static bool GenerateEstimatePdf(this PdfGenerationViewModel Model)
{
string errorMsg = null;
var billdir = Model.DestDir;
var tempdir = Startup.SiteSetup.TempDir;
string name = Model.BaseFileName;
string fullname = new FileInfo(
System.IO.Path.Combine(tempdir, name)).FullName;
string ofullname = new FileInfo(
System.IO.Path.Combine(billdir, name)).FullName;
FileInfo fi = new FileInfo(fullname + ".tex");
FileInfo fo = new FileInfo(ofullname + ".pdf");
using (StreamWriter sw = new StreamWriter(fi.FullName))
{
sw.Write(Model.TeXSource);
}
if (!fi.Exists)
{
errorMsg = "Source write failed";
}
else
{
using (Process p = new Process())
{
p.StartInfo.WorkingDirectory = tempdir;
p.StartInfo = new ProcessStartInfo();
p.StartInfo.UseShellExecute = false;
p.StartInfo.WorkingDirectory = tempdir;
p.StartInfo.FileName = "/usr/bin/texi2pdf";
p.StartInfo.Arguments = $"--batch --build-dir=. -o {fo.FullName} {fi.FullName}";
p.Start();
p.WaitForExit();
if (p.ExitCode != 0)
{
errorMsg = $"Pdf generation failed with exit code: {p.ExitCode}";
}
else
{
fi.Delete();
var di = new DirectoryInfo(Path.Combine(tempdir,$"{Model.BaseFileName}.t2d"));
di.Delete(true);
}
}
}
Model.Generated = fo.Exists;
Model.GenerationErrorMessage = new HtmlString(errorMsg);
return fo.Exists;
}
public static string RenderViewToString(
this Controller controller, IViewEngine engine,
IHttpContextAccessor httpContextAccessor,
string viewName, object model)
{
using (var sw = new StringWriter())
{
if (engine == null)
throw new InvalidOperationException("no engine");
// try to find the specified view
controller.TryValidateModel(model);
ViewEngineResult viewResult = engine.FindPartialView(controller.ActionContext, viewName);
// create the associated context
ViewContext viewContext = new ViewContext();
viewContext.ActionDescriptor = controller.ActionContext.ActionDescriptor;
viewContext.HttpContext = controller.ActionContext.HttpContext;
viewContext.TempData = controller.TempData;
viewContext.View = viewResult.View;
viewContext.Writer = sw;
// write the render view with the given context to the stringwriter
viewResult.View.RenderAsync(viewContext);
viewResult.EnsureSuccessful();
return sw.GetStringBuilder().ToString();
}
}
}
}