From ed7a63015c1583d5544ac18bbaccaedc95f3e5e3 Mon Sep 17 00:00:00 2001
From: Aleksey Veresov <aleksey@veresov.pro>
Date: Fri, 8 Nov 2019 19:49:40 +0300
Subject: [texo] Full rewrite of inner representation.

---
 src/plain.cpp | 132 +++++++++++++++++++++++++++++++++-------------------------
 1 file changed, 76 insertions(+), 56 deletions(-)

(limited to 'src/plain.cpp')

diff --git a/src/plain.cpp b/src/plain.cpp
index 8b3d470..9e9280e 100644
--- a/src/plain.cpp
+++ b/src/plain.cpp
@@ -1,82 +1,100 @@
 #include "plain.hpp"
 
 
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Texo Plain Producer
+ */
 TexoProducerPlain::TexoProducerPlain(TexoExporter &exporter):
     TexoProducer(exporter), quoted(false), newline(false), nospace(true)
 {}
 
-void TexoProducerPlain::End()
+
+bool TexoProducerPlain::End()
 {
     if (!newline) {
         exporter.Put('\n');
         newline = true;
     }
+    return true;
 }
 
-void TexoProducerPlain::Put(const Texo &piece)
+
+bool TexoProducerPlain::Put(char c)
 {
-    if (piece.c == '\n') {
+    if (c == '\n') {
         if (quoted) {
-            exporter.Put("\n> ");
+            return exporter.Put("\n> ");
         } else if (!nospace) {
             if (newline) {
-                exporter.Put(' ');
+                return exporter.Put(' ');
             } else {
-                exporter.Put('\n');
                 newline = true;
+                return exporter.Put('\n');
             }
+        } else {
+            return true;
         }
     } else {
-        exporter.Put(piece.c);
         newline = false;
         nospace = false;
+        return exporter.Put(c);
     }
 }
 
-void TexoProducerPlain::Put(const TexoParagraph &piece)
+
+bool TexoProducerPlain::Paragraph()
 {
+    quoted  = false;
     if (!nospace) {
-        exporter.Put("\n\n");
+        nospace = true;
+        return exporter.Put("\n\n");
+    } else {
+        return true;
     }
-    quoted  = false;
-    nospace = true;
 }
 
-void TexoProducerPlain::Put(const TexoQuote &piece)
+bool TexoProducerPlain::Quote()
 {
+    quoted = true;
     if (!nospace) {
-        exporter.Put("\n\n");
+        return exporter.Put("\n\n> ");
+    } else {
+        return exporter.Put("> ");
     }
-    exporter.Put("> ");
-    quoted = true;
 }
 
-void TexoProducerPlain::Put(const TexoHorizontalRule &piece)
+bool TexoProducerPlain::PutHorizontalRule()
 {
+    bool ok = true;
     if (!newline && !nospace) {
-        exporter.Put('\n');
+        ok = exporter.Put('\n');
     }
-    exporter.Put("--------------------------------------------------\n");
     nospace = true;
+    return ok && exporter.Put(
+        "--------------------------------------------------\n"
+    );
 }
 
 
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Texo Plain Importer
+ */
 TexoImporterPlain::TexoImporterPlain(TexoProducer &producer):
     TexoImporter(producer), state(text)
-{
-    producer.Put(TexoParagraph());
-}
+{}
+
 
-void TexoImporterPlain::End()
+bool TexoImporterPlain::TrueEnd()
 {
     if (state == rule) {
-        producer.Put(TexoHorizontalRule());
+        ok    = producer.PutHorizontalRule();
         state = text;
     }
-    producer.End();
+    return ok && producer.End();
 }
 
-void TexoImporterPlain::Put(char c)
+
+bool TexoImporterPlain::TruePut(char c)
 {
     switch (state) {
     case text:           Text(c);          break;
@@ -88,23 +106,15 @@ void TexoImporterPlain::Put(char c)
     case rule:           Rule(c);          break;
     case paragraph_rule: ParagraphRule(c); break;
     }
+    return ok;
 }
 
-void TexoImporterPlain::Put(const ScriptVariable &str)
-{
-    TexoImporter::Put(str);
-}
-
-void TexoImporterPlain::Put(FILE *file)
-{
-    TexoImporter::Put(file);
-}
 
 void TexoImporterPlain::Text(char c)
 {
     switch (c) {
-    case '\n': state = newline; break;
-    default:   producer.Put(c); break;
+    case '\n': state = newline;         break;
+    default:   ok    = producer.Put(c); break;
     }
 }
 
@@ -114,26 +124,30 @@ void TexoImporterPlain::Newline(char c)
         state = paragraph;
     } else if (c == '-') {
         dash_count = 1;
-        state = rule;
+        state      = rule;
     } else {
-        producer.Put('\n');
         state = text;
-        Text(c);
+        ok    = producer.Put('\n');
+        if (ok) {
+            Text(c);
+        }
     }
 }
 
 void TexoImporterPlain::Paragraph(char c)
 {
     if (c == '>') {
-        producer.Put(TexoQuote());
+        ok    = producer.Quote();
         state = quote_pre;
     } else if (c == '-') {
         dash_count = 1;
-        state = paragraph_rule;
+        state      = paragraph_rule;
     } else if (c != '\n') {
-        producer.Put(TexoParagraph());
         state = text;
-        Text(c);
+        ok    = producer.Paragraph();
+        if (ok) {
+            Text(c);
+        }
     }
 }
 
@@ -148,49 +162,55 @@ void TexoImporterPlain::QuotePre(char c)
 void TexoImporterPlain::Quote(char c)
 {
     switch (c) {
-    case '\n': state = quote_newline; break;
-    default:   producer.Put(c);       break;
+    case '\n': state = quote_newline;   break;
+    default:   ok    = producer.Put(c); break;
     }
 }
 
 void TexoImporterPlain::QuoteNewline(char c)
 {
     if (c == '>') {
-        producer.Put('\n');
+        ok    = producer.Put('\n');
         state = quote_pre;
     } else if (c == '\n') {
         state = paragraph;
     } else if (c == '-') {
         dash_count = 1;
-        state = paragraph_rule;
+        state      = paragraph_rule;
     } else {
-        producer.Put(TexoParagraph());
         state = text;
-        Text(c);
+        ok    = producer.Paragraph();
+        if (ok) {
+            Text(c);
+        }
     }
 }
 
 void TexoImporterPlain::Rule(char c)
 {
     if (c == '\n') {
-        producer.Put(TexoHorizontalRule());
+        ok    = producer.PutHorizontalRule();
         state = text;
     } else if (c == '-') {
         ++dash_count;
     } else {
-        producer.Put('\n');
-        for (;dash_count > 0; --dash_count) {
-            producer.Put('-');
+        ok = producer.Put('\n');
+        for (; ok && dash_count > 0; --dash_count) {
+            ok = producer.Put('-');
         }
         state = text;
-        Text(c);
+        if (ok) {
+            Text(c);
+        }
     }
 }
 
 void TexoImporterPlain::ParagraphRule(char c)
 {
     if (c == '\n') {
-        producer.Put(TexoParagraph());
+        ok = producer.Paragraph();
+    }
+    if (ok) {
+        Rule(c);
     }
-    Rule(c);
 }
-- 
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