Documents: Replace Razor templates with iText

2026-03-16 15:09:47 +01:00
parent d8c967b2f2
commit 8054a024f4
61 changed files with 2291 additions and 2924 deletions
--- a/Elwig/Documents/KernedParagraph.cs
+++ b/Elwig/Documents/KernedParagraph.cs
@@ -0,0 +1,82 @@
+using iText.IO.Font;
+using iText.IO.Font.Otf;
+using iText.Kernel.Font;
+using iText.Layout.Element;
+using iText.Layout.Properties;
+using iText.Layout.Renderer;
+using System;
+
+namespace Elwig.Documents {
+    public class KernedParagraph : Paragraph {
+
+        public KernedParagraph(float fontSize) :
+            base() {
+            SetFontKerning(FontKerning.YES);
+            SetFixedLeading(fontSize);
+            SetFontSize(fontSize);
+        }
+
+        public KernedParagraph(string text, float fontSize) :
+            base(text) {
+            SetFontKerning(FontKerning.YES);
+            SetFixedLeading(fontSize);
+            SetFontSize(fontSize);
+        }
+
+        public KernedParagraph(Text text, float fontSize) :
+            base(text) {
+            SetFontKerning(FontKerning.YES);
+            SetFixedLeading(fontSize);
+            SetFontSize(fontSize);
+        }
+
+        public override KernedParagraph Add(ILeafElement element) {
+            if (element is Text t) {
+                t.SetFontKerning(FontKerning.YES);
+                t.SetNextRenderer(new KerningTextRenderer(t));
+            }
+            base.Add(element);
+            return this;
+        }
+
+        public override Paragraph Add(IBlockElement element) {
+            base.Add(element);
+            return this;
+        }
+
+        public class KerningTextRenderer(Text textElement) : TextRenderer(textElement) {
+
+            public override IRenderer GetNextRenderer() {
+                return new KerningTextRenderer((Text)modelElement);
+            }
+
+            public override void ApplyOtf() {
+                PdfFont font;
+                try {
+                    font = GetPropertyAsFont(Property.FONT);
+                } catch (InvalidCastException) {
+                    return;
+                }
+                if (strToBeConverted != null) {
+                    SetProcessedGlyphLineAndFont(TextPreprocessingUtil.ReplaceSpecialWhitespaceGlyphs(font.CreateGlyphLine(strToBeConverted), font), font);
+                }
+                if (otfFeaturesApplied || text.GetStart() >= text.GetEnd()) {
+                    return;
+                }
+                if (GetProperty(Property.FONT_KERNING, (FontKerning?)FontKerning.NO) == FontKerning.YES) {
+                    ApplyKerning(font.GetFontProgram(), text);
+                }
+                otfFeaturesApplied = true;
+            }
+
+            private static void ApplyKerning(FontProgram font, GlyphLine text) {
+                for (int i = 1; i < text.Size(); i++) {
+                    var kerning = font.GetKerning(text.Get(i - 1), text.Get(i));
+                    if (kerning != 0) {
+                        text.Set(i - 1, new Glyph(text.Get(i - 1), 0, 0, kerning, 0, 0));
+                    }
+                }
+            }
+        }
+    }
+}