Pdf Import Rewrite

Pdf Import rewritten to greatly improve QR Code detection, reduce reliance on iTextSharp and improve thumbnails. Fixes #50
2016-08-26 09:46:35 +10:00
parent 44f6d325db
commit 5ea9a814d6
98 changed files with 3168 additions and 3202 deletions
@@ -0,0 +1,82 @@
+using Spring.Expressions.Parser.antlr;
+using System.Collections;
+
+namespace Disco.Services.Expressions
+{
+    public class EvaluateExpressionPart : IExpressionPart
+    {
+        private Spring.Expressions.IExpression _Expression;
+        private RecognitionException _ExpressionParseException;
+        private EvaluateExpressionParseException _EvaluateParseException;
+
+        public string RawSource { get; set; }
+        public string Source { get; set; }
+        public bool ErrorsAllowed { get; set; }
+        public bool IsDynamic { get { return true; } set { return; } }
+
+        public EvaluateExpressionParseException ParseException
+        {
+            get
+            {
+                if (_ExpressionParseException == null)
+                    return null;
+                else
+                    if (_EvaluateParseException == null)
+                        _EvaluateParseException = EvaluateExpressionParseException.FromRecognitionException(_ExpressionParseException, this.Source);
+                return _EvaluateParseException;
+            }
+        }
+
+        public bool ParseError
+        {
+            get { return (_ExpressionParseException != null); }
+        }
+        public string ParseErrorMessage
+        {
+            get
+            {
+                if (ParseError)
+                    return ParseException.Message;
+                else
+                    return null;
+            }
+        }
+
+        public EvaluateExpressionPart(string Source)
+        {
+            this.RawSource = Source;
+
+            if (Source.StartsWith("{") && Source.EndsWith("}"))
+                Source = Source.Substring(1, Source.Length - 2);
+
+            if (Source[0] == '~')
+            {
+                this.ErrorsAllowed = true;
+                this.Source = Source.Substring(1);
+            }
+            else
+            {
+                this.ErrorsAllowed = false;
+                this.Source = Source;
+            }
+            try
+            {
+                this._Expression = Spring.Expressions.Expression.Parse(this.Source);
+
+            }
+            catch (RecognitionException ex)
+            {
+                this._ExpressionParseException = ex;
+            }
+        }
+        object IExpressionPart.Evaluate(object ExpressionContext, IDictionary Variables)
+        {
+            if (this._ExpressionParseException == null)
+            {
+                return this._Expression.GetValue(ExpressionContext, Variables);
+            }
+            throw this._ExpressionParseException;
+        }
+
+    }
+}